Sincere, to be honest and trust worthy.真诚的，诚实和值得信赖的

I think she was being sincere, so I think we can trust her.我认为她是真诚的，因此我认为可以信任她

Sometimes it's very difficult to know if someone is being sincere, or is just a good liar.有时很难知道一个人是否真诚或只是一个善于撒谎的人

Naive, overly simple and lacking experience.天真，过度地简单和缺乏经验

He wants to change the world, but he's very naive, so he needs someone to help him.他想要改变世界，但他太天真了，因此他需要人帮助他

I think we can take advantage of him, because he is naive and impatient. 我想我能利用他，因为他天真而且没有耐心的

Brilliant, highly intelligent or exceptional in brightness, the opposite of dull.杰出的，高智商或异常的聪明，相反的是迟钝的/呆滞的

There is no doubt that he is a brilliant scientist, but he is a very poor manager.没有疑问他是一个杰出的科学家，但他是一个很差的管理者

It's amazing, how such a brilliant man can be so stupid around women.令人惊奇的，这么聪明的男人怎么会在女人周围变得如此愚蠢

Cruel, mean, manipulative and hurtful, The opposite of kind.残忍的，卑鄙的，操纵的，伤人的，相反的是友善的/和蔼的

He can be cruel when he doesn't like someone, so don't expect him to be nice to you.他有时很残忍当他不喜欢某人时，所以不要期盼他对你好

I was shocked by how cruel he was when he fired her.当他解雇她是，他是多么的残忍令我震惊

Clever, innovative, creative, very smart.聪明的，创新的，创造性的，很聪明

He found a clever solution that allowed us to reduce costs.我找到一个聪明的解决方案，允许我们降低成本

Advertisers are very clever at getting people to buy things they don't really need.广告商非常善于在让人们买他们不是真正需要的东西

Skeptical怀疑的, needs proof or evidence to overcome doubts, the opposite of convinced.怀疑的，需要证据战胜疑问，相反是确信的

I'm sure they will be skeptical of our results, so we need to bring convincing evidence.我确定他们将怀疑我们的结果，因此我们需要带来确信的证据

I'm skeptical that such a simple design can satisfy our requirements.我怀疑这样简单的设计能满足我们的需求

（Your ideas are impressive but I'm still skeptical，so I need more evidence.）

（I don't understand how people can be so cruel to animals.）