As well as conditions which do not break up their molecules,living things need energy to make them breathe,grow and move,which non-living things,like rocks and metals,do not need at all.

• 生物体除了需要不导致分子分裂的条件外，还需要生长和活动的能量。像石头、金属这种非生物体，就不需要这种能量。