Her whole attitude had undergone a subtle change.

她整个态度发生了微变化。

It's a rather delicate situation and you'll need a lot of tact to handle it.

那是一个相当微局面, 你需要用很手段去处理。

The UN must perform a delicate balancing act between the different sides involved in the conflict.

联合国必须在冲突各方间寻求微平衡。

Some language nuance is not interpretable.

某些语言中微是不可翻译。