The American and Japanese navies took the lead in the development of naval aviation...美国和日本海军是发展海军航空部队的佼佼者。The Wright brothers pioneered in early aviation.莱特兄弟是早期航空的先驱.The Gossamer Conder, a human - powered airplane, fle...
The civil aviation minister ordered all the planes to be grounded.民航部长下令所有飞机不得起飞。It's believed the affair was potentially harmful to British aviation.据信该事件可能对英国航空业造成不利影响。Ten years ago, they began to develop the avia...
装在窗框上的厚厚的胶合板挡住了白天的光线。Thick chipboard across the window frames blocked out the daylight.我并不介意白天的噪音。I don't mind the noise during the day.预订了今天白天的戏票.I have ticket reserved for today's matinee....
我二十岁前后那几年过得真苦啊。My late teens and early twenties were really rough years.显然，莫扎特在二十几岁到三十刚出头时，身体非常好。Mozart clearly enjoyed good health throughout his twenties and early thirties.结婚二十年里，他只像样地度过两次假。In twenty years of mar-riag...
Calcium cyanamide is poisonous and irritating to the skin.氰氨化钙是毒性物质,对皮肤有刺激性.A new process, urea - calcium cyanamide method, for producing thiourea from urea and hydrogen sulfide is proposed.利用尿素和硫化氢等原料制备硫脲, 提出了尿素 - 氰氨化钙法...