in accordance with what is required or appropriate; following proper procedure or arrangement
按要求;适当地,恰当地;充分地;正式地,按程序(或安排);按时地
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a document duly signed and authorized by the inspector 一份按要求经检查员签署认可的文件
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the ceremony duly began at midnight. 仪式按时于午夜开始。
as might be expected or predicted
不出所料地
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I used the tent and was duly impressed. 我使用了帐篷,果然令我印象深刻。