Let me repeat that: If there is no DTD, the whitespace is not ignorable.

我再次重申：如果没有DTD，空格是不可忽略的。

youdao

One source of safely ignorable notifications is the "Hey, have you tried feature X?"

可安全地忽略通知的根源之一是“嘿，有你试功能X ？”

youdao

One source of safely ignorable notifications is the "Hey, have you tried feature X?"

可安全地忽略通知的根源之一是“嘿，有你试功能X ？”

youdao