Hold an open book in your hands in front of you and close it quickly. What can you feel?

手中拿一本展开的书放在面前，快速合上书，你能感觉到什么？

youdao

Friends proud linked to failure, and progress with an open mind; Laziness and ignorance mutually close, struggle to shake hands with victory.

骄傲与失败挂钩，虚心与进步交友；懒惰和愚昧相亲，奋斗跟胜利握手。

youdao

Perfectly sized to make it easy for little hands to open and close on their own.

绝对大小的小手，很容易打开和关闭自己的。

youdao

Veronica Giuliani presented with wounds in both hands and feet, as well as in her side, which wounds were observed to open and close on command.

NEWYORKER: Backbone