big discount
广告的效果大打折扣 Advertising effectiveness greatly reduced
这使他们竞选时许下的诺言大打折扣。
This is a serious dilution of their election promises.
《牛津词典》
但是过期的苏打水跑气,味道也会大打折扣。
But soda past its expiration date goes flat and loses much of its taste.
《柯林斯英汉双解大词典》
最优秀的队员受了伤,使得这支队伍的实力大打折扣。
The team suffered a major setback when their best player was injured.
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