气压中心后移使飞机失去平衡。The centre of pressure moves rearward and the aeroplane becomes unbalanced.大西洋上空的低气压通常给英国带来恶劣的天气.A depression over the Atlantic usually brings bad weather in Britain.气压表表明气压在继续下降.The barometer marked a cont...
The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.综述了国内外对异戊酸异戊酯的合成研究的进展情况.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正...
In most of the residence halls we visited, rules prohibit disorderly conduct.在我们走访的学生宿舍里，大多明令禁止胡作非为。Prohibit the sale of alcoholic beverages.禁止出售含酒精的饮料.Legislation can quickly prohibit pesticide use.法律很快就会禁止使用杀菌剂....
We mustn't condemn him on mere suppositions.我们不可全凭臆测来指责他.But as with many such suppositions in natural history, no one had ever tested it.博物学中虽然有许多类似的假设，却从没人对此考证过。We must make one of two following highly improbable ...
Numerically, there are a lot of young people involved in crime.从数字上看，有很多年轻人犯罪。His men were far superior numerically.他手下的士兵在人数上占了绝对优势。The enemy were numerically superior, ie There were more of them.敌人在数量上占优势....
Four nozzles , canted outboard, split the exhaust of the solid rocket motor into four equal tails.四个向外倾斜的喷管把固体火箭发动机的排气流分成四个相等的尾巴.In practice, the turbine disc and the nozzles are fitted into a casing.实际上, 涡轮圆盘和喷嘴是装在机壳里的....
Don't reckon upon your relatives to help you out of trouble.不要指望你的亲戚会帮助你摆脱困境.We reckon to arrive in Delhi at noon.我们估计正午抵达德里." I reckon so,'said Huckleberry; anyways, I'm suited.“ 我猜是这样, ”哈克贝利说, “不管怎样讲, 我挺...