But she couldn't quite put her finger on it.

但她实在说不出原因。

Sissy flushed and started, and Louisa put her finger on her lip.

茜茜脸红了，吓了一跳，路易莎把手指放在嘴唇上。

She tried to put her finger on the arrow in the compass, but she couldn't.

她试图将手指放在罗盘上的箭头上， 但她做不到。

A blush settled again on her face; and half in effort, half in spontaneity, she put her finger on her cheek.

她的脸上又泛起了红晕。 她半是努力， 半是自发地把手指放在脸颊上。

She can't quite put her finger on it, so she decides to relieve some stress by going back to the gym.

她不能完全理解它，所以她决定回到健身房来缓解一些压力。

Helen paid attention to the movements that she felt, then put her fingers on her own throat and lips, making different sounds until she felt something similar and knew that she was speaking correctly.

海伦注意她感觉到的动作，然后将手指放在自己的喉咙和嘴唇上， 发出不同的声音， 直到她感觉到类似的东西， 并且知道她说的是正确的。