One index finger to control the left mouse button, middle finger to control the right mouse button.

其中食指控制鼠标左键，中指控制鼠标右键。

youdao

Show him our middle finger, every one!

各位，让我们向他竖起中指！

youdao

Show him our middle finger, every one!

各位，让我们向他竖起中指！

youdao