二乙醚

Castor seeds were degreased with 3 kinds of solvents including petroleum ether,aether and methylene chloride,and ricins were extracted from the defatted castor cake with acetic acid solution.

方法用石油醚、乙醚、二氯甲烷3种溶剂分别对蓖麻粗籽进行脱脂后，用醋酸水溶液从脱脂的蓖麻饼中提取蓖麻毒蛋白，通过杀鼠活性试验比较3种蓖麻粗毒蛋白的杀鼠活性。

Could keep above 95% in the fixed beds. In order to achieve high stereo-selectivity with yeast, ethyl acetoacetate was used as the model substrate,and a novel approach was proposed to selectively inhibit R-enzymes in yeast before reaction.

以乙酰乙酸乙酯为模型底物，以丙烯酸、乙醚、二甲基亚砜、丙烯酰胺、正己烷等有机溶剂选择性地抑制酵母中R型酶，提高反应立体选择性。

The engine ran on a special mixture of methyl alcohol (63%), benzene (16%), ethanol (12%), acetone (4.4%), nitrobenzene (2.2%), avgas (2%), and ether (0.4%) with MW (methanol-water) injection for charge cooling and as an anti-detonant.

特别混合物燃料为引擎运转提供动力，甲醇(63%)，苯(16%)，对氨基苯甲酸二(12%)，丙酮(4.4%)，硝基苯(2.2%)，飞机用燃料(2%)和乙醚(0.4%)，以100W充电冷却射入并作为抗爆剂。

Alcohols, ketones, esters, alcohols, ethers common media are methanol, ethanol, ethylene glycol, propanol, etc., ketones medium with acetone, methyl ethyl ketone, etc., there are a variety of methyl esters of medium, ethyl ester, ether medium with ether, ethyl ether, butyl ether, etc., they basically did not corrosive materials can be used for the specific use of the property should also be under the media and related requirements to make reasonable choices.

醇类、酮类、酯类、醚类常见的醇类介质有甲醇、乙醇、乙二醇、丙醇等，酮类介质有丙酮、丁酮等，酯类介质有各种甲酯、乙酯等，醚类介质有甲醚、乙醚、丁醚等，它们基本没有腐蚀性，常用材料均可适用，具体选用时还应根据介质的属性和相关要求做出合理选择。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。