I think it is so stupid of people to do bad things to the earth that they are living on! I can't understand why they are doing these. People should care about the environment.
我认为人类在破坏他们赖以生存的地球是愚蠢的！我不明白他们为什么这么做。人类应该关心环境。
I know there are those who don't believe we can do all these things. I understand the skepticism.
我知道有些人不相信我们可以完成所有这些事情，我理解他们所持的怀疑态度。
Like I said, you don't need a book to understand these few basic things, all of which are backed up by psychological research studies.
正如我所说的，你不必去读一本书来明白这些基本的道理，这些都是经过心理学研究验证了的。
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