在Italki上帮你找到一个外国人回答的答案,应该解释的比较地道。解释翻译如下:
Dude算是比较口语化的Guys,通常用在男性之间相互称呼,等同于“哥们、兄弟”,偶尔也会用在女生身上。
Guys 更多用在指一群人,相对dude稍微正式一些
Dude is a slang/casual word used for guys. I have heard people say it to girls before but usually its for guys/men. Guy is also a word that is usually used with men however it can be used with a group of people. I dont really hear people saying fellows. I am American. Americans will understand you but its not a commonly used word.
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