He had to lean on Dan to keep from falling.他不得不靠在丹身上以免摔倒。I horse around quite a lot, just to keep from getting bored.我胡闹了一阵儿, 只是为了摆脱厌烦.He couldn't keep from laughing.他禁不住笑了....
化工产业之冷冻 空调系统 包含有凝结器,蒸发器等不同特质的热交换器.The refrigeration and air - conditioning systems in chemical refineries include heat exchangers of condenser and evaporator....
Objective : To optimize the extraction technology of berberine berberis.目的: 优选三颗针中小檗碱的提取工艺.To optimize the extraction technology of berberine from berberis.优选三颗针中小檗碱的提取工艺.This paper introduced the processing of Berberis ...
有消息说一队坦克已经出动了。Word went out that a column of tanks was on its way.警方出动大量警力防止暴力事件再次发生。Police are out in force to prevent a recurrence of the violence.哥伦比亚出动了军队，并采取了紧急措施。Colombia has called out the army and imposed emergen...