expend基本解释
vt,花费；消耗；用光；耗尽,同近
Children expend a lot of energy and may need more high-energy food than adults..孩子们耗能多，可能比成人需要更多高能量的食物。
花费；消耗；用光；耗尽英释vvto use or spend a lot of energy etc in order to do something
