他吐出断了的牙齿。
One of the broken tooth gear is one of the main reasons.
其中轮齿的折断又是齿轮失效的主要原因之一。
If he had not broken his tooth, he would not be in hospital now.
假如他没有把牙齿弄坏，现在就不在医院了。
If he had not broken his tooth, he would not be in hospital.
如果他没有把牙齿弄坏，现在就不在医院了。
If he had not broken his tooth, he would not be in the hospital now.
如果没有把牙齿弄坏，他就不会现在在医院了。
If he had not broken his tooth, he would not be in the hospital now.
如果没有把牙齿弄坏，他就不会现在在医院了。
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