This is such an important sound in English. It occurs in thousands of thousands of words. If you mispronounce it, your English will sound annoying and be hard to understand.
silly
That's a silly and stupid question.
那是一个非常愚蠢的问题。
Don't be silly.
别傻了,别说傻话。
That's the silliest idea I've ever heard.
那是我所听到的最愚蠢的想法。
How silly of me! I left my keys at home.
我多么糊涂啊!我把钥匙落在家里了。
You're so silly.
你真傻。
skillful 熟练的
question 问题
decide 决定
Have you decided it yet?
你决定下来了吗?
No, I need a few more minutes.
还没有,我需要再考虑一会儿。
cease
The company has ceased trading in this part of the world.