“我相信彼得一定又吃了酸模，才这样呻吟。”他母亲说。

"I am sure Peter has eaten sorrel again, and that makes him groan so," said his mother.

youdao

在一定的条件下酸的东西可以变甜。

Sours sweeten under certain conditions.

youdao

抱怨嘉能可的成功和神秘一定表明其有不可告人之处，很有可能是与嘉能可做生意吃亏的交易方的一种吃不到葡萄说葡萄酸的心理。

Mutterings that Glencore’s combination of success and secrecy must mean it has something to hide are probably just sour grapes from those who have been on the wrong end of a trade with it.

youdao