turn sour

基本解释

Aries lover has no patience and sensitivity and this may be the reason for the most of the relationships to turn sour.
白羊座的爱人往往没有耐心，不够敏感，这也许是众多白羊座的爱情变质的原因。
From minor fall outs to projects that didn’t quite go as planned, there are hundreds of reasons for formerly solid client relationships to turn sour.
从小的争吵到没有完全按计划进行的项目，数百个原因都可以使以前稳固的客户关系恶化。
Such cost pressures, and the fact that only a handful of cancer drugs get to market each year, mean the big investments now being made into cancer drugs are likely to turn sour for many companies.
如此高的费用压力，而事实上每年能进入市场的抗癌药物只有很少一部分。这就意味着制药公司现在大笔花在抗癌药物上的投资很可能得不到收益。

Venture folks have seen a market across the board turn sour on them before.
FORBES: Venture Vetting
As the Libyan intervention threatens to turn sour, there could be recriminations between the two camps.
ECONOMIST: Bagehot
Other times those relationships turn sour and the office becomes a minefield of anxiety and distraction.
FORBES: Who's Finding Love At Work?