两种主要的燃烧产物是水蒸气和二氧化碳。The two principal combustion products are water vapor and carbon dioxide.水蒸气是气态的水.Water vapor is water in the form of a gas.云是由大气中的水蒸气凝结成的.A cloud is a condensation of water vapour in the atmosphere....
蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.有机物分解的最后程序称为腐殖质化.The final process in organic matter decomposition is known as humification.腐殖质是已知能够覆盖滤膜的物...
My girlfriend Lynn and I eloped.我和女友琳恩私奔了。In 1912 he eloped with Frieda von Richthofen.1912年，他和弗丽达·冯·里希特霍芬私奔了。The couple eloped last night.昨晚上他们俩私奔了....
Opium is classed under the head of narcotic.鸦片是归入麻醉剂一类的东西....hormones that have a narcotic effect on the immune system.对免疫系统有麻醉作用的激素They use opium as a sedative, rather than as a narcotic.他们把鸦片用作镇静剂而不是毒品。He appears to be...