Some non-target language forms will never disappear entirely.
一些非目的语形式永远不会消失。
The SLA research concerning the fossilization in interlanguage is mainly based on the SLA environment and focuses on the non-target language forms concerning linguistic structure.
二语习得理论研究的中介语化石化现象主要局限在狭义的二语教学环境内，其侧重点为语言结构的非目的语形式。
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