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1.It is a small device that you move around on a flat surface in front of a computer.
move around 走来走去；绕着……来回转
The planets move around the sun in ellipses.
各行星围绕太阳按椭圆形运转。
There is no room to move around.
地方太小，倒不开身。
2.This interferes with the friends' discussion – just as unwanted sales messages interfere with communication over the Internet.
interfere with 干扰，干涉；妨碍；触动或弄坏；乱动；与……抵触
The trees interfere with the view.
那些树挡住了视线。
Smoking often interferes with health.
吸烟妨碍健康。
