虽然它们很强大，但它的设计方法却由一种不容易为人们所理解。

They're very robust, but designed in such a way that it's not obvious how to understand them.

youdao

虽然它们很强大，但它的设计方法却由一种不容易为人们所理解。

They're very robust, but designed in such a way that it's not obvious how to understand them.

youdao