That subtle change adds 5% more responses.

小小的改变增加了5%的回应。

I noticed a subtle change in his attitude.

我注意到他的态度发生了微妙的变化。

He perceived a subtle change in her manner.

我察觉到他的态度有一个微妙的改变。

Her whole attitude had had a subtle change.

她的整个态度发生了微妙的变化。