问题描述：
超级急!请问这3段里面有什麼文法点?
1.Firstly,supporters of space exploration point out that man has always been curious about the universe,and that it is only natural that we continue to explore it.
2.They claim that it is vital for us to push our boundaries by discovering what is in our solar system.
3.For example,other civilizations might exist out there somewhere,but we will never know about them unless we try to find out.
我想问这3段里面有什麼文法点?
第2段的中文翻译是什麼?
1.Firstly,supporters of space exploration point out that man has always been curious about the universe,and that it is only natural that we continue to explore it.
2.They claim that it is vital for us to push our boundaries by discovering what is in our solar system.
3.For example,other civilizations might exist out there somewhere,but we will never know about them unless we try to find out.
我想问这3段里面有什麼文法点?
第2段的中文翻译是什麼?
问题解答：
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