| 单词 | time keeping |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔CAREFUL〕One of the guards was fiddling with his radio, all the time keeping a wary eye on the five prisoners. 其中一个卫兵一边拨弄着他的收音机，一边却一直在小心翼翼地监视着那五个囚犯。朗文写作活用〔income〕Even on two incomes, we're having a hard time keeping up with our bills.即使有两份收入，我们保持收支平衡还是有困难。韦氏高阶 |
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