... 实验室震动筛(shāi)分机 laboratory sifter 修理梯 ladder for repairing 滞后 lagging ...
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Today, I had to repair a roof on a house. The family was not home while I was repairing it, and the ladder fell down. I was stuck on the roof for 3 hours in the heat until they came home.
今天我自己在家的时候修理屋顶，突然梯子倒了，我被困在房顶上下不来，结果等了三个小时家里人才回来。
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