这座炮以60度仰角开火.The gun was fired at an elevation of 60 degrees.这门炮的仰角为45度.The gun has an elevation of 45 degrees.压根不知道仰角和俯视绘图的概念.You don't even know the definition of high and low angle drawing....
商品现在可以在欧盟各国自由流通。Merchandise can now circulate freely among the EU countries.她的房子光线充足，空气流通，清新整洁。Her house is light and airy, crisp and clean.矿井中用钢制通风机来保持空气流通。The pit is ventilated by a steel fan....
The heptanal butyl mercaptan was synthesized with heptanal, sodium thiosulfate and 1 bromobutane as raw materials.以正庚醛 、 硫代硫酸钠和溴代正丁烷为原料,合成了正庚醛正丁硫醇缩醛....
雪橇可以按天租用。Skis are available for hire on a daily basis.承租人应负责维修租用的房产。Tenants are responsible for the upkeep of rented property.这些船按小时租用.These boats are let out by the hour....