4.An electron is an extremely small corpuscle with negative charge which roundsabout the nucleus of an atom.电子是绕原子核转动且带有负电荷的极其微小的粒子。（动词）5.Her waist measures forty inchesround.她腰围40英寸。（副词）第1节翻译练习21.Rate of penetration was foundto be proportional to the net pressure applied by the tool.人们发现钻孔速度与工具所受的净压力成正比。2.Scientists are constantly striving to findfast and convenient way of obtaining quantitative data.科学家们总是力求找到快速而简便的方法获得定量数据。3.To findthe area of a square or oblong, you merely multiply its length by its width.求一正方形或长方形的面积，你只需将其长度乘以宽度。4.Certain isotopes are not foundin nature.有些同位素在自然界中并不存在。5.New fibers findexpanding applications in engineering and industry.新发明的纤维在工程和工业领域得到越来越广泛的应用。6.7.8.Kangaroos are foundin Australia.大袋鼠产于澳大利亚。This plant is foundin the sea near the mouth of rivers这种植物生长在近河口的海中。Microcomputers have foundtheir application in the production of genius sensors.微型计算机已经应用于智能传感器的生产中。9.Plastics find wide application in our daily life.塑料在我们的日常生活中得到广泛应用。第1节翻译练习31.2.3.4.5.6.7.8.9.low dampinglow brakelow limitlow shotlow currentlow orderlow accesslow keylow brass弱阻尼低速制动器下限仰视拍摄低强度电流低位慢速存取低音调键下半轴瓦