4周搞定2000+托福核心词
疲劳；疲倦
tiredness
常考释义
About the closest any research has come to supporting the tiredness theory is to confirm that adults yawn more often on weekdays than at weekends, and that school children yawn more frequently in their first year at primary school than they do in kindergarten.
最近所有用于支持疲劳理论的研究是为了确认成人在工作日比在周末打哈欠的频率更高；学生在小学一年级比在幼儿园时打哈欠的频率要高。
来源于：阅读OFFICIAL18 P2n. 疲劳；疲倦
He had to cancel some engagements because of tiredness.
他因为疲惫而不得不取消一些预约。
n. 厌烦；厌倦
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