美国邮票星期一涨价，从41美分上调到42美分。邮政当局警告说，"You need to double check the postage on the letter before you drop it in the mail," 大家在寄信之前需要仔细核查邮资是否贴够了。好的，今天我们学习的词是double check...
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462 double check
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今天我们要学的词是double check。 Double check, 是复核的意思。"The teacher told her students to double check their answers before handing in the exam," 老师告诉学生们，交卷之前应该反复检查自己的答案。"They double checked the doors and windows before leaving for vacation," 他们出门渡假前，反复检查是否锁好了门窗。
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