步法

The walk is a four-beat gait in which each hoofbeat is heard separately.

慢是一种四拍法，每一个蹄音听起来都是分开。

Fluoroaniline is synthesized in two steps from p-nitrochlorobenzene and active potassium fluoride.

以对氯硝基苯和活性氟化钾等为原料,经二法合成了对氟苯胺。

Ethyl cellulose was synthesized successfully in one step based on reaction of cellulose with excess chloroethane and sodium hydroxide in toluene as diluent.

采用纤维素与量氯乙烷及氢氧化钠反应,以甲苯为稀释剂,用一法成功地合成了乙基纤维素。

The present situation of terpinyl acetate synthesis has been reviewed.One-step and two-steps process for the synthesis of terpinyl acetate and relevant reaction mechanism are discussed.

综述了乙酸松油酯合成研,讨论了一法和两法合成工艺及相应反应机理。