英语亲们帮忙啦Since hard and fast facts about first language acquis

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/05/16 09:43:55

英语亲们帮忙啦
Since hard and fast facts about first language acquisition are in short supply, it's not surprising to find that there are numerous competing theories on how best to learn a second or third language. One thing is certain though, it doesn't happen overnight.
主要是Since hard and fast facts about first language acquisition are in short supply 怎么理解?

由于缺乏对第一语言习得方面有力而紧密的事实研究,在怎样学习第二或者第三语言方面存在着许多富有竞争性的理论就不足为奇了.
但有件事是确凿无疑的,学习第二或者第三语言并不是一朝一夕的事情.
since是表示原因,后面hard and fast 修饰facts,是“有力的紧密的”这个意思,first language acquisition是第一语言习得,in shot supply是供应不足,就是说这方面的研究还不透彻

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