我不会在电话里详细说明，但我最近有一些健康问题。

I won't ___go ___into ___detail over the phone, but I've been having a few health problems recently.

这份较长的文件详细描述了实验。

The longer document ___goes ___into detail about the experiments.

在他的一本书中，他详细描述了孩子们如何对待那些在“新”语言上有困难的其他孩子。

In one of his books he really ___goes ___into ___detail [about] how children treat other children [who] have difficulties with their "new" [language].