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vi.发生（happen的过去式及过去分词）
1、haptene───n.半抗原
2、append───vt.附加；贴上；盖章；n.设置数据文件的搜索路径
3、happen───vi.发生；碰巧；偶然遇到
4、happed───n.机会，运气；偶然；vi.偶然发生；n.(Hap)人名；(柬)哈；(中)洽(广东话·威妥玛)
5、behappened───行为
6、sharpened───adj.尖锐的
7、happens───发生；碰巧
8、appended───adj.附加的；添加的；v.附加；贴上；增补（append的过去式和过去分词）
9、dampened───使潮湿；抑制（dampen的过去式和过去分词）
1、I hate the fact that you ignored me for so long and then you start talking to me like nothing happened.───我讨厌你很长一段时间都忽略我然后又突然开始和我说话，好像什么事也没有发生。
2、Can you confirm what happened?───你能证实一下发生了什么事吗？
3、In Orel there happened to be several French prisoners, and the doctor brought one of them, a young Italian officer, to see Pierre.───在奥廖尔有几个被俘的法GuoJun官，这位医生带来了其中一个年青的意大利军官。
4、You can't seem to forget that bad thing that happened to you. . . . three doors down, someone has forgotten the names of her children.───你似乎无法将发生在你身上不幸的记忆忘却，三扇门后，某人却无法记起她孩子的名字。
5、Then a strange thing happened.───接着一件怪事发生了。
6、What happened! I exploded.───出什么事了！”我情绪爆发了。
7、She was so sad. "If I got married to the prince, this would never happened. " She regretted that she ignored the prince.───她很伤心。“要是我嫁给王子的话，这件事就不会发生。”她后悔她对王子的不理不睬。
8、The exceeding this range, skin piece of far end pole are easy to incomplete blood necrosis happened.───超出这个范围，皮瓣的远端极易发生缺血坏死。
9、Here he would be brought before Congress, asked a few questions and then go on doing the same thing as if nothing ever happened.───在这里，他会被带到国会面前，被询问几个问题，然后继续从事同样的勾当，就像什么事情也没发生过一样。
1、Tell us exactly what happened and don't prevaricate.
2、It happened a few minutes ago.
3、A strange thing happened this morning.
4、You'd better be silent about what happened.
5、Nothing happened to mar the old man's happiness.
6、These things happened in the past years.
7、I blame myself for what has happened.
8、Heaven knows what's happened to them.
9、Don't keep us in suspense-what happened next?