sour (EN)

形容词，动词

形容词 “sour”

1. 酸
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   To make foods taste more sour, you can add vinegar.
2. 变质 (尤其用于牛奶)
   The milk went sour, so we'll have to throw it away.
3. 冷淡
   She spoke in a sour tone, making everyone feel unwelcome.
4. 酸性 (土壤)
   The farmer struggled to grow crops on the sour soil in the back field.

动词 “sour”

1. 破坏 (使不愉快和不友好)
   The argument soured their friendship, and they stopped talking to each other.
2. 变质 (牛奶)
   The milk soured after being left out of the fridge overnight.