selfish: 自私的
It's selfish of you to even try.
即便试一试也显示你是自私的。
Do cellphones make people selfish?
手机能让人们变得自私么？

stupid: 愚蠢
The european union is a horrible, stupid project.
欧洲联盟是一个十分糟糕且又愚蠢的规划。
What if I look stupid?
如果我挺笨的怎么办？