sign off on +
正式同意 (某事)
The CEO signed off on the plans to increase the number of foreign workers. (執行長正式同意增加外勞人數的計畫)
sit up
感興趣；驚訝
I sat up when he told me he was closing the company. (當他告訴我他將關閉公司時我感到驚訝)
The news that the president was taken ill suddenly really made us sit up. (總統突然病倒的消息著實讓我們大吃一驚)
sit up
坐直
I have told you many times to sit up straight. (我已經告訴你很多次要坐直)
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