checking
['tʃekɪŋ]
n.
校核，校[检]验，检查，核算，验算;
v.
检查，核对( check的现在分词 );
阻止;
存放;
托运（行李）;
例句:
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He figured up the balance in their checking account.
他算出了他们活期存款账户上的余额总和。
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It is certainly worth checking up on your benefit entitlements.
查清楚你可以享受哪些福利是绝对有必要的。
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I'm sure he knew I was checking up on him.
我能肯定，他当时知道我在暗中调查他。
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You should be checking it several times a day.
来自WSJ
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I find myself checking it multiple times a day.
来自VOA
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Mentally checking out while another is speaking to you?
来自SA