差距

My daughter and son always have frictions. 我女兒和兒子總發(fā)生矛盾。

Friction causes a rolling ball to stop finally. 摩擦力使?jié)L動(dòng)的球最終停了下來(lái)。

Constant friction wore out the heels of my shoes. 不斷的摩擦磨損了我的鞋跟。

Friction between two sticks can create a fire. 兩個(gè)棍棒相互摩擦能起火。

In the absence of friction belted machinery would not be used. 沒有摩擦力，皮帶傳動(dòng)的機(jī)器就無(wú)法使用。

Matches are lighted by friction. 火柴由摩擦而生火。