第一，迷你對話

A:Too hot! This summer's weather is abnormal.

太熱了！今年夏天的天氣不正常。

B:It's a pity that our classroom is not air-conditioned.

真遺憾教室里沒有空調。

A:Air-condition? Are you dreaming? We even haven't a fan.

空調？你做夢呢？我們連臺電扇都沒有。

B:Maybe a book can do duty for a fan.

或許書本可代替風扇。

A:Yeah, We are so poor.

對呀，我們好可憐啊。

第二，詞海拾貝

do duty for something ：充當，代替......之用

e.g. Let’s roll the log up to the fire; it can do duty for a bench.

讓我們把這圓木滾到爐火邊，它能當凳子用呢。

do duty for someone：替某人履行職務

E.g. Mr Rogers will do duty for me while I'm away next week.

下周我外出時，羅杰斯先生代我履行職務。

第三，短句口譯

教室沒有裝空調。

譯：The classroom is not air-conditioned.