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- refined pyridine base 精练吡啶碱类
- 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;
- He is a man of subtle and refined sensibility. 他是个感情细腻的男子。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
- The runner went to second base on a wild pitch. 一记瞎设让跑垒员跑上了第二垒。
- The firm's top man refined on his management style. 公司总裁对管理作风作了精微的改进。
- You cannot enter a military base without a permit. 无通行证者不得擅入军事基地。
- She has a refined way of speaking. 她谈吐优雅。
- Her heavy industry rests on a broad and firm base. 它的重工业有广泛坚实的基础。
- Formal, refined, and restrained in style. 拘谨的，精炼的风格正式、精致和克制的
- 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
- refined pyridine 精吡啶
- He caught me off base with that question. 他的问题猝然把我给问倒了。
- The bombers swooped on the air base. 轰炸机突袭空军基地。
- Suited to one of good breeding; refined and polite. 有教养的，有礼的与良好教养相称的; 优雅的，礼貌的
- Many languages have Latin as their base. 许多语言都以拉丁语为基础。
- Not refined; indelicate and crude. 粗俗的不优雅的; 无教养的和粗鲁的
