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By the action of feedback mechanism, the system outputs are soil and water loss pricking up, biological diversity being destroyed, heavily soil degrading etc.. And then brings forward some countermeasures such as developing watershed management, resuming
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通过对系统模型进行分析,提出开展小流域综合治理,恢复和重建山地生态系统,加强坡耕地退耕还林对策研究等生态环境对策,以此缓和人地矛盾,实现系统的可持续发展。 |
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By the addition of an umbrella-shaped baffle above the feed sprayer in the column, the liquid entrainment from the column can be diminished.
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在精馏塔进料喷头上方增设伞形档板,可以减少精馏塔带液量。 |
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By the advanced technology, excellent performance, powerful output, attractive appearance, reasonable price and quality service, Changnei brand diesel engines sell well domestically and export to many countries.
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常内柴油机以其成熟先进的技术、卓越的性能、强劲的动力、精美的外观、合理的价格及优质的服务,行销全国各地并出口海外诸多国家。 |
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By the afternoon, my eyes, throat and nose were itching and in need of lubrication if not medication.
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到了下午,我的眼睛、喉咙和鼻子开始发痒、干燥,就算不需服药的话,至少也需要一些滋润。 |
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By the age add , human will put on weight easy.
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人们上了岁数就容易发胖. |
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By the age of 19 Gauss had discovered for himself and proved a remarkable theorem in number theory known as the law of quadratic reciprocity.
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高斯十九岁已经独立地发现并证明了数理定理——二次互反律。 |
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By the age of 40, Beethoven was completely deaf.
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贝多芬在四十岁时全聋。 |
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By the age of fourteen,he had learned advanced maths.
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到十四岁时,他已学习高等数学。 |
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By the aid of advanced computer techniques, the production of new juggled culture often combines the direction, the playwright, the acoustic equipment and the image manipulation into a unity.
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新型恶搞作品在制作手段上多借助电脑先进技术,融导演、编剧、音响配置、图像处理于一身,在表达手法上采用夸张放大、戏仿、剪辑移植、篡改变形等方法。 |
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By the analyses of corrosive medium and manufacturing process quality, the cracks of glycol evaporators in Dushanzi Petrochemical Company have been confirmed to be intergranular corrosion cracks.
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摘要通过裂纹宏微观形貌分析、腐蚀介质分析、对蒸发塔制造过程质量分析等,证实了独山子石化乙二醇蒸发塔的裂纹属晶间型应力腐蚀裂纹。 |
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By the analysis and comparison of the particles of dust flow, the main force acting on the particles of dry dust flow is Van Der Waals force and the liquid-bridging force on the particles of wet dust flow are found.
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通过时尘流中尘粒受力的分析,得出在乾燥环境下作用在尘粒上的主作用力是范德华力;在湿润情况下作用在尘粒上的主作用力是液桥力的结论。 |