Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using ceric sulfate as the catalyst.以硫酸高铈为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl bu...
The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.综述了国内外对异戊酸异戊酯的合成研究的进展情况.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正...
使用陶制的活栓,认为是不够安全的.The use of stoneware cocks is not considered to be safe enough.医生关掉小活栓.The doctor shut off the petcock.该小活栓适用于连接内径为6mm的橡胶管.This petcock is suitable to connect the rubber pipes with the inside diameter of...
MCM is an important method of miniaturizing electronic systems.多芯片组件(MCM)是实现电子系统小型化的重要手段之一.Multichip module technology ( MCM ) is the optimal way of providing circuIt'system miniaturization.多芯片组件技术 ( MCM ) 促使 电路系统 小...
She gives frequent performances of her work, both at home and abroad.她经常在国内外演出自己的作品。Agency France Presse enjoys great popularity both at home and abroad.法新社在国内外都很有名气.Saga features trips for older people at home and abroa...
This organism secretes a few extracellular products including capsular polysaccharide ( CPS ), protease, cytolysin and phospholipase.创伤弧菌会表现许多细胞外的产物,包括荚膜多醣体 、 蛋白酶 、 细胞溶解毒素与磷脂酶.For example, the archegonium ( female organ ...
Standing in the watchtower, we admired the surrounding scenes.我们站在碉楼上, 欣赏四周的景色.Most millefleurs tapestries show secular scenes or allegories.许多百花挂毯的图案都是普通景色和寓言故事.The battle scenes of those years reappeared in his mind�...
The only discovered animals are water bears, mites, microscopic rotifers.能够发现的动物只有海蜘蛛 、 螨和微小的轮虫.Mites are frequently found on eggs.螨会经常出现在蛋上.Mites are a tiny parasitic insect, the cask has some defensive effect.螨虫是一种微小的寄...
戈登先生突然闭口不言，他的朋友们知道有哪儿不对劲了。Mr. Gordon stopped talking, and his friends knew something was up.他知道罪犯是谁，但却闭口不说。He knows the culprit but is not letting on.邻居们试图想让他自感羞愧而从此闭口，他是不会乖乖就范的。He would not let neighbours shame him into...
In the hot sun the rain-washed herbs smelled sharp and spicy and sweet all at once.烈日下，被雨水冲刷过的香草闻起来既冲又香气扑鼻。The kitchen smelled warm and inviting and blessedly familiar.这间厨房的味道温暖诱人,使人感到亲切温馨.The room smelled of lemons.房间里有...