Nilsen and Nilsen write, "Smiles are more likely to express feelings of satisfaction or good will, while laughter comes from surprise." We laugh when something unexpected happens.

艾伦·尼尔森和唐·尼尔森写道：“微笑（smiles）更多是表达满足感和善意，而大笑（laugher）则来自于惊喜。”当发生一些预期以外的事情时我们会laugh。

属类：学习英语-Ask a Teacher 名师答疑-名师答疑：smile和laugh的区别

There are other ways to express the meanings of "pass the buck."

还有其它方式来表达推卸责任这层意思。

属类：学习英语-Words And Their Stories 词汇掌故-词汇掌故：推卸责任

Some websites say this expression dates back to the 18th-century England. One site says that it first meant a common facial expression used to express dislike or contempt. These days, the contempt is gone and in its place are terms like irony. An irony is when you say the opposite of what you mean, usually to be funny.

一些网站称，这种表达可以追溯到18世纪的英格兰。一家网站称，它最初是指一种用于表达不喜欢或蔑视的常见面部表情。如今，这些蔑视的意味消失了，取而代之的是反语之类的说法。反语是指说出跟本来意思相反的话，通常都很有趣。

属类：学习英语-Words And Their Stories 词汇掌故-半真半假为何如此有趣？

Over and above both express that something is in a higher position than something else. And, sometimes, you can use either word.

这两个单词都表示某个物体的位置比其它物体更高，有时候这两个单词随便用。

属类：学习英语-Ask a Teacher 名师答疑-名师答疑：over和above的使用

As a verb, laugh means "to smile while you are making a sound from your throat." When writing, Americans often use the words "ha ha" to express this sound.

作为动词，laugh意思是指“从喉咙里笑出声来。”美国人在写作中经常使用哈哈这个词来表示这种笑声。

属类：学习英语-Ask a Teacher 名师答疑-名师答疑：smile和laugh的区别