0 a small mammal with short fur, a pointed face, and a long tail -- 鼠
1 a small device that you move across a surface in order to move a cursor on your computer screen -- (電腦的)滑鼠
2 a shy, quiet, nervous person -- 靦腆害羞的人
You can move the cursor either by using the mouse or by using the arrow keys on the keyboard.
A mouse is a device which makes it easier to select different options from computer menus.
Select the function you require by pointing to the toggle with the mouse and then clicking.