The text is too long for us to learn by heart.
这篇课文太长了，以致我们不能够记住。
The teacher asked us to learn by heart as many excellent poems as possible.
老师要求我们尽量多背些美妙的诗歌。
Only when you understand this kind of knowledge, can you learn it by heart.
只有当你理解领会了这种知识，才能把它记住。
We should learn this lesson by heart.
我们应当记住这一教训。
Can you learn all these new words by heart in an hour?
你能在一小时之内记住所有这些单词吗？
The teacher asked us to learn the poem by heart.
老师让我们背诵那首诗。
It 's very difficult for the children to learn the poem by heart.
对孩子们来说背诵那首诗很困难。
I don't think you've learn it by heart.
我认为你还没有记住它。
So, be more serious and learn it more carefully by heart.
所以，你们一定要更严肃认真地学习啊。
用心学习这些单词。
Second, learn more words by heart, then do the English conversation practice with our classmates.
第二，学习更多的单词，跟同学们做英语会话练习。
Please learn the new words by heart.
请用心记住这些生词。
You could learn these words by heart.
你要用心记住这些词。
You'd better underline these words and try to learn them by heart.
你最好在这些单词下面划上横线，并且努力把它们背下来。
Only in this way can you learn it by heart.
只有这样你才能把它牢记在心。
Vocabulary: You need to learn words by heart.
词汇：你需要学习的心脏的话。
The teacher insisted that he (should) learn the vocabulary by heart.
老师坚持他应该背单词。
People with good memory can learn long poems by heart.
具有良好记忆力的人能熟记长诗。
你必须用心学习。
You should always learn this lesson by heart.
你要把这个教训牢记于心。
He had managed to learn the contents of the letter by heart.
他已设法把这封信的内容背了下来。
This paragraph contains a very good description. I hope you will learn it by heart.
这一段描写得很好，希望你们把它背出来。
Some people have very good memories, and can easily learn quite long poems by heart.
有些人记忆里很好，很长的诗很容易就记熟了。
Some people have very good memories, and can easily learn quite long poems by heart.
有些人记忆里很好，很长的诗很容易就记熟了。
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