According to 90% criterion, the order of segmental acquisition is identified. Data on 75% of the groups are also presented for comparison with other language studies.

根据90%的标准，我们确定了音段习得的顺序，又用75%的标准比较了上海话习得和其它语言习得的异同。

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Recent studies show that markedness is an essential factor determining the order of second language acquisition, and that learners tend to acquire unmarked language items before marked ones.

语言类型的标记关系是影响第二语言习得顺序的一个重要因素，学习者往往首先习得无标记的语言项目，然后才习得有标记的项目。

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Studies UG_based second language acquisition focus on the presentation of second language knowledge, while cognitive theory focus on compute and processing.

基于普遍语法的二语习得研究主要关注二语知识的表征形式，而认知处理则更关注语言信息的计算和处理过程。

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