Benzyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,丁酸和苄醇为原料合成丁酸苄酯.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 bu...
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 butyrate was synthesized by using gallium sulfate supported on silica gel as the catalyst.以自制的硅胶固载硫酸镓为催化剂,正丁酸和...
The grinder was powered by a windmill.这磨盘由风车提供动力.a coffee grinder咖啡研磨器The workers of the factory went off the beaten track and designed a new - type grinder.该厂工人打破常规,设计了一台新型磨床.hard grinder埋头读书的学生, 刻苦钻研的学生Sweet potato gri...
Drugs are a problem that requires constant vigilance.需要对毒品问题长期保持警惕。Calumny requires no proof.诽谤无需证据。All citizens must do as the law requires.凡是公民均应按法律的要求办事。The brain requires a constant supply of oxygen...大脑需要持续供氧。He...
将军忽然带着几分揶揄的神气,冲他嘻嘻一笑.The General grinned at him suddenly with some mockery.他以揶揄的声调继续说.He continued in a quizzical tone.影片表现了教师所面临的挑战, 体现了细微和揶揄的幽默.The film shows the challenges that confront teachers, but a subtle and wry...
Our company's cargo vessels have fixed anchorages in the harbour.我们公司的货轮在这个港口有固定的锚位.The harbour is slowly silting up.港口正在慢慢地被淤泥堵塞.a commodious harbour方便的港湾Green and yellow lights blinked on the surface of the harbou...
There were also surprises in store for me.也有一些令人吃惊的事在等着我。It'surprises me that you, of all people, should be so foolish.所有人中偏偏你这样笨, 真使我惊奇.We've had some unpleasant surprises.我们得到了一些令人不快的意外消息....
肘部 、 飞节和足爪既不向内弯,也不向外翻.Elbows, hocks and feet turn neither in nor out.到足爪的距离短, 既不向内弯,也不向外翻.飞节关节清晰.The hocks are short to the feet, turning neither in nor a well defined hock joint.尾鳍边缘一定要直或是向外弯曲, 不能向内弯折.Caudal edges have ...
It is easier to descend than to ascend.下降容易上升难。We're not going to descend to such methods...我们不会沦落到使用这种手段。Things are cooler and more damp as we descend to the cellar.当我们往下走去地窖时，四周愈见阴冷潮湿。As soon as the volume steadie...