appear和happen的区别

appear和happen的区别 appear 和 happen的区别 happen和appear区别是什么求大神帮助 appear 和seem的区别 happen to和happen at的区别： happen with和happen to的区别 appear to concern 和appear concerned的区别 appear,take place,happen的区别不要纯翻译的区别啊,要语法上的 appear和show up 的区别? take place和happen的区别 happen 和take place 的用法区别 come about和 happen用法的区别 happen to 和 chance的区别 befall和happen to的区别是什么? seem,look,appear的区别 appear,seems,look的区别 occur happen的区别 appear happen change有什么区别要求说明详细,否则检举!