having a relaxed, friendly, or unofficial style, manner, or nature
不拘礼节的,轻松的;友好的;随意的
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an informal atmosphere 无拘束的气氛
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an informal agreement between the two companies .两公司间的非正式协定。
of or denoting a style of writing or conversational speech characterized by simpler grammatical structures, more familiar vocabulary, and greater use of idioms and metaphors
(写作或谈话风格)非正式的,随意的,轻松的。
(of dress)casual; suitable for everyday wear
(着装)闲适的,适合日常穿着的。
(of economic activity)carried on by self-employed or independent people on a small scale, especially unofficially or illegally
(经济活动)自发组织的(尤指非官方或非法的)。