在作功冲程期间,气门的位置都是关闭的.The position of the valves during the power stroke are both closed.动力冲程的后段是绝热膨胀过程.The remainder of the power stroke is an adiabatic expansion.当排气冲程开始时, 气缸被向上运动着的活塞刮掠.When the exhaust stroke starts, the...
Gunpowder is composed of sulfur, carbon, and potassium nitrate.火药是由硫 、 碳和硝酸钾组成.A smell of gunpowder penetrated the woods.森林中弥漫着火药味.Gunpowder was used in China as far back as the 11 th century.远在公元11世纪,中国已使用火药.Gunpowder w...
Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。The lack of humus and the excessive leaching make this soil almost useless for agricultural purpose.缺少腐殖质和...
The noise pollution survey revealed a rather spurring and possibly amusing old fashioned source of noise.这个有关噪音的污染调查还揭示了一种出人意外而同时可能会引人意外而同时可能会引人发笑的老式噪音源.Only 16 per cent of young women in a 1990 survey considered themsel...
她的丝绸连衣裙是天蓝色的，和她眼睛的颜色一样。Her silk dress was sky-blue, the colour of her eyes.她放下了那块一直用来擦眼睛的手帕。She lowered the handkerchief which she had kept dabbing at her eyes.眼睛的颜色显示你的基因遗传特征。Eye colour shows your genetic inheritance....
Sterilise bottles, teats and utensils by boiling or using an approved sterilizing agent.将奶瓶 、 奶嘴和容器用开水消毒或用专用的消毒剂.A biological indicator for monitoring the effectiveness of a sterilizing, disinfecting, etc.本专利公开了一种用于检测杀菌 ...