come into being
汉译：un. 1.同意；2.建立;诞生 ； v. 1.开始存在
英译：to start to exist
例句：
1.Magazines come into being to voice the new sentiments in the air.
鼓吹新风尚的刊物纷纷问世。
2.come into being or existence, or appear on the scene.
形成或存在，或在现场出现。
3.New stars continued to come into being from the gas clouds of the disk.
新的恒星继续从圆盘中的气体云中形成。
come about
汉译：v.发生,形成,到来un.1.喂;得啦;走吧;快一点2.迎风转向3.改向
英译：v.to take place or occurun.happen
例句：
1.History shows, however, that such a transformation may come about as a result of an initial stimulus to increase social insurance.然而历史表明，这样的一种转变可能作为增加
社会保险的起始刺激的一个后果而发生。2.Living creatures are too complex to have come about by chance; therefore they must have had a designer.生物太复杂了不可能随机产生的；所以它们一定有一个设计者。3.Except that this would be to misunderstand how this state of affairs has come about.只不过，这将是对目前状况成因的误解。
望采纳！！！！