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The crucial thing to understand about this position is that it's not self-correcting.
要理解这个点的关键因素是，它是不会自动修正的。
youdao
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Objective: To apply the self - made hook in correcting posterior rotation.
目的：自制拉钩在矫治后牙扭转中的应用。
youdao
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Objective: To apply the self - made hook in correcting posterior rotation.
目的：自制拉钩在矫治后牙扭转中的应用。
youdao