The heart pumps by expending and contracting of muscle.心脏通过收缩肌肉抽取和放出(血液).Not giving or expending freely; sparing.节俭的,节省的不随便施舍或花费的; 节俭的.You are expending your plant.贵公司在扩厂....

expending的音标：...

v.花费( expend的现在分词 )，使用（钱等）做某事，用光，耗尽...