这是以前我从英语点津上看到的，分享一下
可以翻译为“suffer a big loss for a little gain”或“ lose the main goal because of small gains”。
例句：
我们不能因小失大。
We can't risk big things for the sake of small ones.
不要因小失大，而要从全盘考虑问题。
You should have the overall situation in mind, refraining from seeking small gains at great cost.
