弄清楚宇宙有多大很困难.翻译英语.It is hard ____ ____ ____large the ___is.
问题描述：
弄清楚宇宙有多大很困难.翻译英语.It is hard ____ ____ ____large the ___is.
答
It is hard to know how large the universe is.
弄清楚宇宙有多大很困难.翻译英语.It is hard ____ ____ ____large the ___is.
It is hard to know how large the universe is.