That requires a fairly huge knowledge base.

那要求一个相当巨大的知识基础。

youdao

To build such base areas is no easy job; It requires hard and bitter struggle.

建立这种根据地，不是轻而易举的事，必须经过艰苦奋斗。

youdao

To build such base areas is no easy job; It requires hard and bitter struggle.

建立这种根据地，不是轻而易举的事，必须经过艰苦奋斗。

youdao