It's under-documented in that even recent PHP books don't cover it.

它还在进行文档整理，因为即使最新的php书籍都没有涉列它。

youdao

The validation code is scattered across multiple source files and is often under-documented.

与验证有关的代码通常散布在多个源文件中，文档也不甚详尽。

youdao

The extrovert ideal has been documented in many studies, though this research has never been grouped under a single name.

许多研究都证明了外向的理想性格，尽管这些研究从未被归类在一个单一的名字下。

youdao

Under those 1996 reforms, two-thirds of the poor on the program left for work, resulting in a documented increase in their incomes of 25%, while saving taxpayers 50% of the costs of the old program.

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