can’t see the wood for the trees的意思是 “见木不见林”，也就是“做某件事情时太专注于细节，没有注意整体大局；因而可能会错漏重要的信息；只重细节，不顾整体”。

【例句】
When you can't see the wood for the trees, take a step back and remind yourself what you are doing.
当你看不到整体大局时，退一步并提醒自己正在做什么。

She can't make a decision about the project because she can't see the wood for the trees.
对于这个计划她决定不下来，因为她见树不见林。