您好，翻译如下：
第一句：作为一个5岁的小孩,他还没有对自己行为负责的能力。因此,他的父母应该对其行为负责。
As a five years old kid,he yet could not be responsible for his behavior/deed.so his parents shoule afford.
第二句：2.人造卫星载着各种外太空的数据回到地球，向人们揭示宇宙的奥秘。Carrying information/datas of the outer space,satelites come back to the earth to solve/UNCOVER the mysteries/SECRET of the universe.
这本身就是空间探索给人们最大的回报。
And it's itself is the contribution to human beings as a return of the space exploitation.
3.父母们发现与他们的孩子交流越来越困难了
Parents found it's getting more and more difficult to change ideas with their kids.