1、We found it very hard to learn so many new words by heart in only one hour.
我們發(fā)現(xiàn)僅僅在一個小時里背這么多生詞是很困難的。

2、When I was at school, I had to learn a poem by heart every day.
我讓學的時候，每天要背一首詩。

3、Objective:To explore the feature of the pleural effusion aroused by heart failure.
目的：探討心力衰竭引起的胸腔積液的特點。

4、Know the specifications by heart and deviate from them only after careful consideration.
要將規(guī)范熟記于心，如果要背離規(guī)范，需經(jīng)過慎密的考慮后才可以這樣做。

5、Can you learn all these new words by heart in an hour?
你能在一小時之內(nèi)記住所有這些單詞嗎？

6、We had better learn by heart as many sentence patterns as we can
我們最好盡可能多背句型。

7、The regional crisis makes people tortured by heart blank and disorientation, and so on.
出現(xiàn)信仰危機，人們普遍心靈空虛，迷失方向等等。

by heart翻譯