1·It is a constitutional isomer of dimethyl ether.
这是二甲醚的结构异构体。
2·Previously, MTBE (methyl tertiary-butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.
以前，MTBE（甲基叔丁基醚）曾作为汽油充氧剂，但是，在2004年，人们发现它污染了地下水，所以就不再使用它了。
3·Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.
根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。
4·The content of carotenoid and petroleum ether extract reduced at three months of aging and then increased.
类胡萝卜素和石油醚提取物含量在陈化三个月时降低，之后上升。
5·Lubricity evaluation method of dimethyl ether fuel was investigated by correlation analysis on the basis of experiments.
在试验的基础上，采用相关分析法研究了车用二甲醚燃料润滑性能的评定方法。
1·First of all, Ethernet stations check to see if the ether is idle (carrier sense) and wait if they sense a signal.
首先是“载波感测”。以太网站先检查“以太”是否空载，如果检测到信号了就排队等候自己的发送机会。
2·However, conceptual attempts to fill it up, most famously with ether as a hypothetical medium, have regularly created more problems than they solved.
然而试图以某种概念作为填充(其中最著名的要属将以太假设为某种媒介)，其结果通常是由此引发的新问题比解决的还要多。
3·Some of your scientists see energy, matter, ether.
有些科学家看见的是能量、物质、以太。
4·Some I found who had conquered the ether.
我发现一些人已经征服了以太。
5·In the second ether we are not only presented with that lesson, we are also tested by situations that demand our neutrality.
在第二个以太，我们不仅仅是可以看到这个功课，同样，我们也会被那些情境所考验，这些情境要求我们保持中立。
1·The researchers start off by drying their coffee grounds overnight and then pour in some common chemical solvents, such as hexane, ether and dichloromethane, to dissolve the oils.
研究人员使用的方法是将咖啡渣隔夜使其干燥，然后放入一些常见的化学溶剂中，例如正己烷、乙醚和二氯甲烷，来溶解咖啡渣中的油类成分。
2·The method of extracting the auxin in seaweeds with organic solvent, separating and purifying the auxin by ether extraction method and column chromatography has been established.
确立了以有机溶剂提取海藻中的生长素，以乙醚萃取法和柱层析法对生长素进行分离纯化的方法。
3·Neither polymethylmethacrylate nor polymethylmethacrylate-grafted copolymer could be isolated by the reaction of polystyrene methylene lithium prepared in ether solution with methyl methacrylate.
在乙醚溶液制得的聚苯乙烯次甲基锂与甲基丙烯酸甲酯反应不能分离出聚甲基丙烯酸甲酯及它的接枝共聚物。
4·Various fractions of tannins with different polarities and relatively narrow molecular weight distribution were obtained by extractions using ether and ethyl acetate sequently .
通过乙醚和乙酸乙酯萃取可得到极性不同的组分。分析表明，各级分的分子量分布范围不同，且相对较窄。
5·The effects of NC dry weight, the water contents of dehydrated NC and centrifugal alcohol dehydrated NC and ether added quantity on the contracting percentage of grains have also been discussed.
讨论了硝化棉干量、脱水棉及酒精驱水棉的水分含量以及乙醚加入量对药粒收缩率的影响。