A1.accident: 事故(n.) I saw an accident when I walked in the street. 意外、偶然的事(n.) (accidentally)2.appear: 出现 (vi) A ship appeared on the horizon. (disappear消失) 好象, 似乎(vi) She appears to have many friends.3.apply: 申请（for）(vi) Mr.Wang decided to apply for the job. 运用、应用 （to）(vt.) Our teacher applies this teaching method to his class.4.arm手臂 (n.) 武装 (v)Lay down your arms or well fire！放下武器，否则，我们就开枪了！Police say the man is armed with guns and very dangerous. 警察
