heat motion的用法和樣例：
例句
- The vibrations which constitute a wave in a gas superposed on the random thermal motion.
氣體中形成波的振動疊加在這種無規則熱運動上。 - Moreover, since the atoms are in random thermal motion the frequency spectrum will be altered by the Doppler effect.
而且，由於原子是在作無規則熱運動，多普勒效應也會使頻譜發生改變。
