词典
例句
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简体中文
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
learn the ropes
learn up
参考
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learn sth from the ground up
➞
learn sth from the ground up
Definitions
[1] 从头开始学(某事)
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简体中文
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learn sth from the ground up