在研究动作概念形成时，动作概念结构问题是研究的关键。

When I study the action concept formation, I find the key point is the action concept structure.

youdao

在研究动作概念形成时，动作概念结构问题是研究的关键。

When I study the action concept formation, I find the key point is the action concept structure.

youdao