例87　One of the difficulties in exploring the universe is that the universe is so large and unimaginable that we can not reach the end of it.

【结构分析】本句的主语是One of the difficulties，后面是介词短语in exploring the universe做定语，系动词是is，后面是表语从句that the universe is so large and unimaginable that we can not reach the end of it。

【亮点回放】此句话的亮点在于超长表语从句的使用，此表语从句里面是用了so...that...这种固定搭配。

【核心词汇】

one of the difficulties　困难之一

exploring the universe　探索宇宙

unimaginable　无法想象

【参考译文】我们探索宇宙遇到的困难之一是宇宙如此地巨大和不可思议以至于我们无法触摸到它的尽头。