It combines a solid, often lively,beat with a looser, complex melody.

VOA: special.2010.01.24

You burn methane, and it combines with oxygen to form water, to form CO2.

燃烧酒精，酒精分子和氧气结合形成水和二氧化碳。

麻省理工公开课 - 热力学与动力学课程节选

It combines live action with motion-capture, animation and other technologies.

VOA: special.2010.03.01

It combines live action, motion-capture,animation and computer-produced images.

VOA: special.2010.01.01