Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization.烯酮, 特别是二甲基烯酮, 很容易齐聚和聚合.The purity of dimethyl disulfide was determined by capillary gas chromatography.应用毛细管气相色谱法测定二甲基二硫的纯度.Marine livi...
Several kinds of novel extraction solvents were presented which mainly included N - formylmorpholine, dimethyl formamide, etc.介绍了石油化工领域采用的几种优良抽提剂,包括N - 甲酰吗啉 、 二甲基甲酰胺等.Process for synthesizing dimethyl phthalate ( DMP ) f...
七十五岁了,他的身躯还是挺直的.At 75 he is still erect.他的双臂必须拚命支撑着,才能保持挺直的姿势.He had to hold himself upright with both hands.他年事已高,过去挺直的腰板弯了.Age had bowed his once straight back....
The birds cling to the wall and nibble at the brickwork.鸟儿们紧贴在墙上，啄着砖缝。Instead of snacking on crisps and chocolate, nibble on celery or carrot.不要把薯片和巧克力当零食来吃，要吃些芹菜和胡萝卜。We each took a nibble.我们每人咬了一小口。...
Hold your diet steady and, very quickly, you are vaporizing body fat.坚持定量饮食, 很快, 你身体内的脂肪就在蒸发了.The ammonium chloride is neutralized by vaporizing and thickening from mother liquors.而吸附钼后剩下的母液蒸发、浓缩、结晶出氯化铵,可用作农用化肥.With a va...
玛丽总是最殷勤的女主人。Mary was always the perfect hostess.我不喜欢过分殷勤的店员.I don't like oily shop assistants.殷勤的主人总想设法让他们的客人舒适.Gracious hosts always try to make their guests comfortable....
咔嗒一声,猎人扳动了枪机.There was a click as the hunter cocked his rifle.他扳上枪机,把它放在身边.He cocked his gun and laid it beside him.他伸手摸到那支空枪, 瞄准了, 扳动枪机.He reached for his empty gun, aimed, and pulled the trigger....