They interceded with the authorities on behalf of the detainees.他们为被拘留者向当局求情。He gave witness on behalf of an accused person.他为被告作证.She gave witness on behalf of the accused person.她替被告作证....
他们友好而随意地谈论各种话题。They talked amiably and easily about a range of topics.这位海军中校随意地朝他们挥挥手便扬帆而过。Giving them an airy wave of his hand, the Commander sailed past.职员们随意地将文件塞进文件夹里。Clerks bundled papers into files willy-nilly....