词典
例句
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简体中文
learn of
learn off
learn on the spot how cotton grow
learn one's lesson
learn sth by heart
learn sth by memory
learn sth from the ground up
learn sth the hard way
learn sth. the hard way
参考
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learn sth by heart
➞
learn sth by heart
Definitions
[1] 记住某事
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learn sth by heart