Silly: foolish or stupid or ridiculous; the opposite of serious.
可笑的（silly）：愚蠢或可笑的，严肃的（serious）的反义词。
He is being silly, so we should just ignore him.
他很可笑，所以我们不应该理他。
That's a silly idea, so I don't think she means what she's saying.
那是个愚蠢的想法，所以我不认为她是认真的。
Amazing: to be incredible or so good as to be hard to believe; the opposite of ordinary.
令人吃惊的（amazing）：难以置信，好的令人难以置信；普通的（ordinary）的反义词。
That company's new products are truly amazing.
那家公司的新产品真是太棒了。
She gave an amazing performance, especially after all the difficulties she had to overcome.
她的表演非常精彩，尤其是在她克服了那么多困难之后。
Crucial: to be of extreme importance or an essential part; the opposite of optional.
至关重要的（crucial）：非常重要的，或根本的；可选的（optional）的反义词。
It's crucial that we get them to sign the contract by the end of the week.
让他们在这个周末之前签署合同非常关键。
Getting that data is crucial for our success.
获取这些数据对我们的成功至关重要。
Impressive: to stand out and be unforgettable in a good way.
令人印象深刻（impressive）：脱颖而出，好的令人难忘。
His presentation was so impressive that we decided to hire him right away.
他的表现给人令人印象深刻，所以我们决定马上雇用他。
They have an impressive website, but the quality of their products is pathetic.
他们有一个令人印象深刻的网站，但他们的产品质量很差。
Realistic: to be possible and attainable.
现实的（realistic）：可能的，可实现的。
That deadline isn't realistic, so we need to ask for more time.
那个截止日期不现实，所以我们应当要求更多的时间。
He isn't being realistic when he expects to charge such high prices for his products.
他期望自己的产品可以卖出很高的价钱如此之高，这是不现实的。
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