•casual clothes便装

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•The psychologist's attitude seemed far too casual, even brutal.那个心理学家的态度似乎太过冷淡了，甚至有些冷酷。

•Security around the conference hotel seemed almost casual.举行会议的饭店周围的安全措施似乎不太严格。

•Although close to tears, she tried to make her voice sound casual.尽管都快掉眼泪了，可她还是尽力使自己的声音听起来满不在乎。

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•casual labour/labourers/workers零工／临时工

•casual sex随便的性关系

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•It was just a casual comment , I didn't mean it to be taken so seriously.我只是随便说说而已，不是当真的。

•To a casual observer , everything might appear normal.对于一个漫不经心的人来说，也许看上去一切正常。