cooladj.凉爽的；凉的；冷静的；冷漠的vt.(使)变凉；(使)冷却；(使)冷静vi.变凉；冷静下来n.凉爽；冷静；凉快adv.冷静地cool wind凉风

1. John couldn't keep cool when he met his rival.
   约翰见到他的对手就不能冷静下来。
2. These days it may keep you from losing your cool.
   今天，它可能会使你保持冷静。