例句與造句

1. Scientists now believe that some of the force of friction is due to attraction between the molecules of one surface and those of the surface sliding over it
   現(xiàn)在科學(xué)家們認(rèn)為有些摩擦力是由于物體表面的分子和另一物體表面游動的分子之間的吸引力所引起的。
2. It's difficult to find surface slide in a sentence. 用surface slide造句挺難的