Each stage has its normal developmental missions and tasks that you can identify and work through in many different ways.

其中每个阶段都有标准的启发性任务和目标，你可以根据自己的情况多方面灵活采纳。

youdao

These are developmental language skills that include aural language usage and word classification tasks.

如何利用听力和单字和一些文法来表现语言技能。

youdao