x8u15．elect vt.选择；决定做某事；选举某人→election n．选举10．occur vi.发生；出现11．indicate vt.指出；标示；表明；暗示→indication n．迹象→indicator n．指示器，指示物14．slip vi.滑动；滑行；滑跤 n．滑动；滑倒15．hire vt. & n．租用，雇用3．occur vi. 发生，出现occurred; occurringoccurrence n. 发生；出现sth. occurs to sb.sth. strikes sb.sth. comes to sb.it occurs to sb. to do sth.it occurs to sb. that－clause
