词典释义：
the showing of politeness in one's attitude and behaviour towards others
有礼貌；谦恭
-
he had been treated with a degree of courtesy not far short of deference .他受到的礼遇近乎敬重。
[count noun](常作
（尤指社会习俗要求的）谦恭有礼的言语（或行为）
-
the superficial courtesies of diplomatic exchanges 外交交锋中表面上的彬彬有礼。
[as modifier](especially of transport)supplied free of charge to people who are already paying for another service
（尤指交通运输）免费的
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he travelled from the hotel in a courtesy car .他乘坐免费接送车离开旅馆。
[count noun]
〈古〉 屈膝礼。
-
by courtesy he was not at the conference only by courtesy . 他出于好意才没有参加会议 -
（
by courtesy of photographs courtesy of the Evening Star 《星晚报》提供的照片 -
informal as a result of；thanks to 〈非正式〉 作为…的结果；因为，由于
"Middle English： from Old French
