braces是brace的复数形式，意思是：背带；吊带。
例句：
He wore leg braces after he had polio in childhood.
小时候患小儿麻痹症后，他使用了腿部支架。
Why do I have braces and wear glasses?
为什么我要系上背带戴上眼镜？
What if the dentist says my child needs braces?
牙医如果说孩子需要戴牙箍，怎么办？
once they made him wear a brace but he fretted so he was downright ill.
有一次，他们让他戴上支架，但他焦躁不安，因此病得很重。
He took lessons, and had to wear a hip brace for a year.
他上了芭蕾课，还戴了一年的矫正器。
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