我写此话题的原因是，我的左手不小心被一个折叠式扶梯夹了一下，以至于现在左手的大拇指一片青紫，无法移动。
The reason I'm writing on this, is that I accidentally trapped my left hand in afoldableladder, and now my left hand thumb is completely black and blue and can hardly move itself.
我写此话题的原因是，我的左手不小心被一个折叠式扶梯夹了一下，以至于现在左手的大拇指一片青紫，无法移动。
The reason I'm writing on this, is that I accidentally trapped my left hand in afoldableladder, and now my left hand thumb is completely black and blue and can hardly move itself.
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