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[电] 回答
🗣️ 情景例句
My final test is worth half my grade.
我的期末考试结果占我总成绩的一半。
Jack is up and about now.
杰克病后复原了。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。