词典
例句
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improve the quality of varieties
improve the shining hour
improve the tilth of the soil
improve upon
improve upon sth
improve visual and auditory acuity
improved
improved agricultural technology
improved basic allowance
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improve upon sth
➞
improve upon sth
Definitions
[1] 作出比...更好的东西, 对...作出改进, 改进, 超过
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