Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.There a...
Its $25m reserve fund had been run down to around $8m.其2,500万美元的储备金已被减少到了800万美元左右。The property business could be sold or run down.可售出或削减房地产业务。The old man was run down by a big lorry.那个老人被一辆大卡车撞倒了....
该防水层可吸收交变负荷(震动膨胀收缩),粘结力强.The layer , being high adhesive, can absorb the alternating load.产品粘结力强, 产品性能稳定,贮存期长.The product has strong adhesion, stable performance and long storage time.这种新浆糊的粘结力很强.This new paste makes a f...
Superficially there have been many changes in Britain in recent years.近几年来英国的面貌发生了很多变化。The film touches on these difficult questions, but only superficially.这部电影触及了这些难题，但只是蜻蜓点水式的。The film touches on these issues, but onl...
We saw all the rarities of Oxford and talked with two or three fellows of colleges.我们看到了牛津所有的古迹珍物并同两三位学员谈天.He smarted under the gibes of his fellows.他因受同伴的嘲笑而苦恼.I was on my own and these fellows came along towards me...我...