Stencil manufacturing techniques include chemical etching, laser cutting and electroforming.钢网制作技术包括化学腐蚀, 激光切割和电铸.Original plate: Relief printing plate produced bu 7 photomechanical etching as distinct from electrotyping...
In this paper, a discrete stage - structured epidemical model is proposed and studied.本文主要讨论了离散的阶段结构传染病模型.OBJECTIVE To explore the administration measures of air condition usage in SARS epidemical period.目的研究传染性非典型肺炎流行期间...
我们这个小公司的因特网网页已经有了78,000次的点击量。Our small company has had 78,000 hits on its Internet pages.我们帮助一些小公司顺利起步。We help small companies to get off the ground.当前的经济气候对小公司不利.The present economic climate works against the smaller co...
枯死的榆树已被移去而换栽了一排幼树.The dead elms have been replaced by a row of saplings.这些幼树已经扎根了.The young trees have struck root.老苹果树必须挖掉,种上幼树.The old apple trees must be grubbed up and young ones planted....
A ‘use by’ date must be stamped on all perishable goods.易腐产品都应标明保质期。He stamped his butt on the floor.他在地板上踩灭了他的烟蒂。His words stamped him to be a bigot.他讲的话表明他是个偏执的人.It was suppressed in the early 1920 s, stamped as " deca...
The allies are intensifying their air campaign.联军部队正加大他们的空战强度。The rest of the European powers were in a state of intensifying congestion.其余的欧洲强国则处于越来越拥挤的状态.Britain is intensifying its efforts to secure the release of the...