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- light pyridine base 轻吡啶碱
- Pyridine bases are widely used in pharmaceutical, pesticide, aromatics, rubber and dyestuff industry. 吡啶碱广泛应用于合成医药、农药、香料、橡胶和染料。
- The application of pyridine bases in the field of pharmaceuticals, pesticide, aromatics, rubber, and dyestuff are introduced. 介绍了吡啶碱类化合物在医药、农药、香料、橡胶和染料等领域的应用。
- It is the main way in industy that pyridine bases are manufactured from carbonyl compound and ammonia using improved ZSM - 5 zeolite as catalyst. 目前,工业上主要以羰基化合物和氨为原料、以改性ZSM-5沸石作催化剂生产吡啶碱类化合物。
- There are two manufacturing methods of pyridine bases: extraction from coal tar and catalytic synthesis from ammonia, formaldehyde and acetaldehyde. 二是从氨和甲醛、乙醛的合成过程中获得。欧盟、美国、日本是主要的生产国,主要采用化学合成法生产;
- I groped for the light switch in the dark room. 我在黑暗的房间里摸索着找电灯开关。
- The portrait shows fine effects of light and shade. 这幅肖像画的浓淡色调表现得很好。
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- Now I begin to see light on their good intentions. 现在我对他们的良好动机开始有所领会了。
- The bright light of the car dazzled me. 这汽车的灯光使我目眩。
- He turned off the dash light and drove on. 他关掉仪表板上的灯，继续驱车前进。
- The light was diffused by the leaves. 树叶使光线漫射。
- I grope for the light switch in the dark room. 我在黑洞洞的屋里摸索著寻找电灯开关。
- The light bulb in the kitchen burnt out. 厨房里的电灯泡烧坏了。
- Test Method for Pyridine Bases in Cresylic Acid by Direct Titration 直接滴定法测定甲苯基酸中吡淀碱的试验方法
- A strong light impinged on his eyes. 一道强烈的光刺着他的眼睛。
- He can see a glimmer of light through the curtain. 他能透过窗帘看到一丝微光。
- She runs up the stairs with a light graceful step. 她以轻快优雅的步子奔上楼去。
- We troubled him to turn on the light. 我们麻烦他打开电灯。
- A crepehanger usually sees life in a gloomy light. 悲观者常以沮丧态度来看人生。
