彼得把玻璃杯打翻，从桌上掉下去摔碎了。
他想当然地认为那个桶是自己从桌上掉下的，转身离开了。
Assuming that the bucket fell from the table, he turns and exits.
一本书从你旁边的书桌上掉下来，突然，老师递给你一份突击测试。
A book falls off the desk next to you. Suddenly, the teacher hands you a pop quiz.
一本书从你旁边的书桌上掉下来，突然，老师递给你一份突击测试。
A book falls off the desk next to you. Suddenly, the teacher hands you a pop quiz.
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