Wising Up About Wisdom Teeth為題目的作文
Wising Up About Wisdom Teeth
This is the VOA Special English Health Report.
Wisdom teeth are normally the last teeth to appear in the mouth. It usually happens when people are older and wiser. That is, when they are in their late teenage years or early twenties.
Wisdom teeth are molars, or chewing teeth at the back of the mouth. The third set of molars, if you have them, are your wisdom teeth.
They can grow into place normally and never cause a problem. But often there is not enough room for them in the mouth. They might crowd the other teeth. Sometimes they even push through the gums sideways.
An impacted wisdom tooth is one that fails to completely rise through the gums -- the term is erupt. Wisdom teeth that only partly erupt can leave space for bacteria to enter around the tooth. Infection is a risk in these cases.
Experts say people should have their mouths examined between the ages of sixteen and twenty for placement of their wisdom teeth. X-rays can show wisdom teeth below the gums. Those that are not well aligned and become impacted are often removed.
The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums. Removal is also advised if there is a chance that poorly aligned wisdom teeth will damage other teeth. And removal is called for in cases where fluid collects around a wisdom tooth that is partly or fully below the gum.
But why do we have wisdom teeth if we often need to get them removed? One theory has to do with our diets. Scientists say the diet of prehistoric humans probably required more chewing teeth. Life was probably a little rougher on the teeth back then, too. So it was good to have extras.
The removal of wisdom teeth is performed by oral surgeons. They say if removal is advised, the best time to do it is before the teeth cause any problems or pain.
The American Association of Oral and Maxillofacial Surgeons says young adults are the best candidates for wisdom teeth removal. The group says older patients may be at greater risk for disease in the tissue surrounding the molars.
Patients can have general anesthesia during the operation. Or they might choose to have a local painkiller and remain awake. It may depend on the condition of the wisdom teeth and the number to be removed.
After surgery, there can be swelling of the gums and face and some pain. Both can be treated with cold wraps and medication.
And that's the VOA Special English Health Report, written by Caty Weaver. I'm Faith Lapidus.
智齒一般是口腔中長出的最后一顆牙齒。通常在人越來越年長，越來越聰明的時(shí)候出現(xiàn)。也就是，大約在二十歲左右出現(xiàn)。
智齒一般是長在口腔后部的臼齒或者嚼牙。如果你有第三顆磨牙，那就是你的智齒。
他們一般長在比較正常的位置，通常不會(huì)造成什么問題。但是通常，口腔里沒有足夠的空間能夠容得下臼齒。它們可能會(huì)擠壓其他牙齒，有時(shí)甚至?xí)䴖_破牙齦。
阻生智齒是指沒有完全萌生的智齒。只有部分萌生的支持會(huì)給細(xì)菌留下空間，使細(xì)菌侵入牙齒周圍，在這種情況下容易引發(fā)感染。
專家表示，16歲到20歲的人群應(yīng)該進(jìn)行口腔檢查，確定支持可能萌發(fā)的位置。X射線能夠確認(rèn)出智齒在牙齦下的位置。那些位置不均衡，有可能造成阻生的通常會(huì)被拔除。
美國牙科協(xié)會(huì)表示，通常，在智齒不完全萌生的情況下會(huì)建議拔除。如果位置不均衡的智齒有可能損害其他牙齒，也建議將其拔除。液體在部分或完全萌生的`智齒周圍聚集的時(shí)候也要求將其拔除。
但是，既然通常情況下都要將智齒拔掉，那么為什么還會(huì)長智齒呢？其中一個(gè)理論表示跟我們的飲食有關(guān)�？茖W(xué)家表示，史前人類的飲食習(xí)慣要求有更多的磨牙。那時(shí)候的生活可能也更艱難一些，所以，有更多的磨牙還是比較有利的。
口腔及頜面外科醫(yī)師協(xié)會(huì)表示，年輕人是拔出智齒的最佳人選。該組織表示，更年長的病人磨牙周圍的組織患病的風(fēng)險(xiǎn)更大一些。
拔除智齒一般由口腔醫(yī)生進(jìn)行。他們表示，如果需要拔除智齒，最好是在智齒造成任何問題或疼痛之前。
在手術(shù)過程中病人可以采取整體麻醉�；蛘咚麄兛梢赃x擇止痛藥，可以保持清醒。這取決于智齒的狀況和需要拔除的數(shù)量。
手術(shù)過后，牙齦和面部可能會(huì)有些浮腫，也會(huì)有點(diǎn)疼痛，這都可以用冰袋或者藥物治療。
1.gum n.樹膠,橡皮,橡皮糖,牙床,上帝
例句：Cement's main roles are to anchor the tooth in the gum and to help form new teeth.
粘固粉的主要作用是讓牙齒固定在牙齦上，幫助形成新的牙齒。
2.sideways ad.向旁邊,斜地里,向側(cè)面地
例句：He chopped accross the ball to make it spin sideways.
他切了一下球，讓它朝一邊旋轉(zhuǎn)。
3.erupt v.爆發(fā)，萌發(fā)
4.align v.排列,排成一行,結(jié)盟
例句：She neatly aligned the flower pots on the window sill.
她把花盆整齊地排成一行在窗臺(tái)上。
5.removal n.移動(dòng),搬動(dòng);遷居;除掉,切除;排除
例句：Surgical removal of the posterior arch of a vertebra.
椎板切除術(shù)切除脊椎后弓的手術(shù)
6.prehistoric a.史前的;舊式的
例句：This prehistoric animal grew a thick protective covering.
這種史前動(dòng)物長著一層厚厚的保護(hù)性外皮。
7.surrounding adj.周圍的
例句：Land surrounding the lake will be developed for residental use.
湖周邊的土地將會(huì)開發(fā)成住宅。
8.swelling n.腫脹,增大
例句：This pearl powder will keep the swelling down.
這種珍珠粉會(huì)消腫。
1.Wisdom teeth are normally the last teeth to appear in the mouth.
不定式做后置定語
不定式在句中做定語通常做后置定語，即放在被修飾名詞或代詞后。它通常有以下幾種用法：
(一)不定式�？捎脕硇揎椢�，表示要做某事。
如：1.The next train to arrive was from NewYork.下一列到站的火車是從紐約開來的。
2.I have nothing to say on this question.在這個(gè)問題上，我沒有什么話要說。
3. We are looking for somewhere to live.我們正在找一個(gè)地方住。
(二)不定式還可用來修飾人。
如：1.He was the first guest to arrive.他是第一個(gè)到達(dá)的客人。
2.Miss Brown was the next person to rise to speak.布朗小姐是下一個(gè)起來發(fā)言的人。
3.He was a brave man to do what he did.他是個(gè)勇者才有這樣的行為。
(三)很多特定的名詞后也可用不定式做定語，這樣的名詞常用的有：way，time，reason，chance，opportunity，need，wish，effort，right，ambition等。
如：1.It's time for you to get up and go to school.你該起床去上學(xué)了。
2.There is no reason to doubt his word.沒有理由懷疑他的話。
3.They have now an opportunity to go abroad to study further.他們現(xiàn)在有機(jī)會(huì)出國深造。
(四)某些動(dòng)詞或形容詞后可接不定式時(shí)，它相應(yīng)的同根名詞也常用不定式做定語。
如：1.He made an attempt to learn English well.他試圖學(xué)好英語。(attempt to do sth)
2.His ability to get on with people is his chief advantage.他能和人相處是他的主要優(yōu)勢(shì)。(be able to do sth)
3.I don't trust his promise to come for a visit.我不相信他來訪的諾言。(promise to do sth)
4.Her anxiety to succeed led her to work hard.她迫切想成功，這促使她努力工作。(be anxious to do sth)
2.Experts say people should have their mouths examined between the ages of sixteen and twenty for placement of their wisdom teeth.
“have sth. （賓語） 過去分詞（賓語補(bǔ)足語）”意為“讓/叫/使/請(qǐng)別人做某事”。賓語sth.后面用過去分詞作賓語補(bǔ)足語，說明sth.與過去分詞表示的動(dòng)作之間是被動(dòng)關(guān)系。例如：
We had the machine mended just now.
我們剛才請(qǐng)人把機(jī)器修好了。
He has had his hair cut.
他（請(qǐng)人給他）理發(fā)了。
The patient is going to have his temperature taken.
這個(gè)病人準(zhǔn)備請(qǐng)/叫/讓人量體溫。
3.The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.
break through突破,沖破;戰(zhàn)勝,克服
例句：Demonstrators tried to break through the police cordon.
群眾企圖突破警察的封鎖線。
4.It may depend on the condition of the wisdom teeth and the number to be removed.
depend on依賴,依靠;取決于,隨…而定
例句：They depend on a particular historical situation.
它們?nèi)Q于特定的歷史境況。
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