I’m afraid geophysics is rather a closed book to me.
我对地球物理学
窍不通。
n. 已结束的计划和行动等；
所知的东西
所知的东西He closed the book, yawned, and went to bed.
他合起
, 打了个呵欠, 然后上床睡觉了。
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close-confinement, close-coupled, close-cropped, close-cut, closed, closed book, closed circuit, closed circuit television, closed corporation, closed interval,