Diglycol diacetate had been obtained with sulfuric acid or toluene - p - sulfonic acid as catalyst in lab.研究了在实验室条件下,以硫酸、对 甲苯 磺酸为催化剂合成二甘醇二醋酸酯的方法.The synthetic principle and the process method diglycol dioleate were discu...
a silver brooch with ruby insets镶嵌红宝石的银胸针She is wearing a small ruby earring.她戴着一枚红宝石小耳环.The shooting-range is lit from underneath by rows of ruby-red light fittings.射击场被一排排深红色的灯光设备从下面照亮了....a ruby and diamond ring.红宝石钻戒...
天文研究开始向整个电磁波谱范围延拓.Astronomical research began to spread over the whole range of electromagnetic waves.分子转动的实验研究被称为微波波谱学.The experimental study of molecular rotation is called microwave spectroscopy.微波波谱学家已经确定了许多分子的转动常数.M...
一名工人用金属箍箍那保险箱.A worker put metal bands around the safe.外科医生在膝盖骨上套了个金属箍以帮助其愈合。Surgeons placed a metal band around the knee cap to help it knit back together.这桶有两个金属箍箍着.The barrel had two metal hoops round it....
Large dosage can cause headaches, dizziness, vomiting, tremors, gastroenteritis and pathogenic erections.阴虚阳浮﹐满气逆及麻疹已透者忌服.大剂量可能导致头痛 ﹐ 晕 ﹐ 吐 ﹐ 抖 ﹐ 胃发炎﹐茎病态勃起.A sudden dizziness overpowered him...他突然感到一阵眩晕。A fit of dizzines...