An agreement was about to be reached when the other side raised new issues.

快要达成协议的时候，对方又节外生枝。

《新英汉大辞典》

An agreement was about to be reached when the other side raised new issues (or caused complications).

快要达成协议时，对方又节外生枝。

youdao

"I look nothing of the sort," said Bree. But then suddenly he rolled round on his side, raised his head and looked hard at Shasta, blowing a little.

“我看起来丝毫也不可笑。”布里说道。但这当儿它却突然翻身侧卧，抬起头来，紧瞅着沙斯塔，还稍稍有点儿气喘。

youdao

"I look nothing of the sort," said Bree. But then suddenly he rolled round on his side, raised his head and looked hard at Shasta, blowing a little.

“我看起来丝毫也不可笑。”布里说道。但这当儿它却突然翻身侧卧，抬起头来，紧瞅着沙斯塔，还稍稍有点儿气喘。

youdao