descend /diˈsend/ vi.& vt. 1. 走下来，下山；落下来: The elevator descended slowly to the ground floor. 电梯慢慢地下到底层。The sun descended behind the hills.太阳落到山后边去了。［考句］We managed to reach the top of the mountain, and half an hour later we began to descend.我们成功地到达山顶，半小时后我们开始下山。2.用于短语  descend from 是…的后代，由…传来的：Men descended from apes.人是从猿变来的。descend on/upon 袭击，突然去访问：Wolves descended on the flock. 狼袭击羊群。