291. 首先,你必須努力工作。
[誤] At first, you must work hard.
[正] First, you must work hard.
注:at first 指“起初,開始的時候”,如:At first I found this question very difficult, but finally I managed to answer it(一開始我覺得這個問題很難回答,不過最後我還是答出來了);first 纔是指“首先”。又如:First, let me introduce myself(首先,請允許我介紹一下我自己)。
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