just as 了解的意思 1. 就像.... , 正如.... 3.正当...之时
Non-standard varieties of human language are just as entertaining.
提供的翻译：非标准类型的人类语言同样有趣。
这个“同样”非常疑惑？
Non-standard varieties of human language are just as entertaining.
这实质是，在形容词entertaining之后省略了as（引出比较的事物）的结果。just 只不过起强调用途。just as 并不是固定搭配，假如不理解去死记硬背，对你的英语学习很不利。
依据语义推断，省略的部分可能是：
Non-standard varieties of human language are just asentertaining as the standardhuman language .
黎老师这个例句：We all need regular exercise, but a healthy diet isjust asimportant.
实质也是承前省略，完整的说法是：
We all need regular exercise, but a healthy diet isjust asimportant as regular exercise .
