But the results varied widely, possibly because of inaccurate estimates of methyl chloroform released by human activities.
但是，结果已经发生了很大变化，可能是因为对人类活动生成的甲醇氯仿物估计不准造成的。
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。
Darwin taught us that it takes many generations for a genome to evolve, but researchers have found that it takes only the addition of a methyl group to change an epigenome.
达尔文告诉我们基因进化需历经数代，而研究人员发现只有增加一组甲基，就能改变外基因。
Latex gloves are a better option for handling thinners with methyl ethyl ketone but for only a limited duration per glove pair.
乳胶手套是处理含丁酮稀释液更好的选择，但是每副手套只能在有限的时间内处理（丁酮）。
Methyl orange is one of acid dyes, but its range of use is greatly limited because of its low light and thermal stability.
甲基橙是一种酸性染料，但因为它的光和热稳定性较差，使其应用范围和使用效果受到了一定限制。
Through adding low viscidity Hydroxypropyl Methyl Cellulose, workable performance of the dry mix can be most improved, but compress strength reduce.
通过掺入低粘度的羟丙基甲基纤维素后，砂浆的施工和易性能得到了极大的改善，但强度有所降低。
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.
以前广泛使用的增氧剂是甲基叔丁基醚，后来有研究发现甲基叔丁基醚会污染地下水，因此在2004年久停止使用了。
But what happens if the methyl defense falters?
如果说这种甲基防御出了问题，又会发生什么事呢？
The shorter chain alkyl D glucosides such as methyl , ethyl , n butyl, and n penthyl D glucosides, but no long chain n dodecyl D glucoside, are obtained during reactions.
在反应中得到较短碳链的D -葡萄糖苷，如甲苷、乙苷、正丁苷和正戊苷，而不能得到长链的正十二烷基D -葡萄糖苷。
Branching degree of the polyethylenes and the content of methyl branch rise quickly with reaction temperature, but the content of long branches drops remarkably.
随着温度的升高聚乙烯产物支化度和甲基支链含量都迅速增加，长支链含量则显著下降。
The amount of catalyst used for the hydrogenation of methyl benzoate and ethyl benzoate did not affect the yields, but affected the speed of hydrogenation.
氢化苯甲酸甲酯和乙酯时，应用催化剂量多少，似对产量无影响，惟对氢化作用速度有关系。
But neither separation recycling dry gas, or directly use the ethylene production of ethyl-benzene or dry gas methyl ethylbenzene, all is recycled in FCC dry gas effective method of ethylene.
但是无论是分离回收干气中的乙烯，还是直接利用干气生产乙苯或对甲基乙苯，都是回收利用催化裂化干气中乙烯的有效方法。
Hydroxypropyl methyl cellulose used in life is very wide, but in actual use process, the average person is difficult to be identified.
羟丙基甲基纤维素在生活中的使用范围很广泛，但是在实际的使用过程中，一般的人很难将它们识别出来。
The content of isoniazid in its tablets was determined by using potassium bromate method, but the indicator of ethoxychrysoidine was replaced by methyl orange.
以甲基橙代替乙氧基黄叱精指示剂，用溴酸钾法测定异烟肼片含量。
Indeed, the Southeast has greater measured deposition than the Northeast, but both regions have serious methyl mercury problems.
的确，美国东南部测得的汞堆积量比东北部高，但两个地区都有严重的甲基汞问题。
The preliminary results indicate that these molecular clefts not only recognize neutral molecules, but also show good enantio selectivity for D/L amino acid methyl esters.
初步研究表明，这类裂缝型受体不仅对中性小分子具有优良的识别性能，而且对D/L氨基酸甲酯具有良好的手性识别能力。
The preliminary results indicate that these chiral molecular tweezers not only recognize neutral molecules, but also show enantio-selectivity for D/L-amino acid methyl esters.
初步研究结果表明，这类分子钳受体不但对中性小分子具有识别性能，而且对D/L氨基酸甲酯具有对映选择性识别性能。
It was shown that the addition of functional monomer methyl acrylic acid could not only improve emulsion stability but also be advantageous to formation of regular core shell structure.
结果表明：加入甲基丙烯酸有利于胶粒的稳定和形成规则的核壳胶粒。半连续加料不会形成完全反转的核壳结构，但是，核层在反应过程中由于聚合物簇的迁移会造成形变。
Therefore, the presence of abundant 4-methyl steranes is a necessary but not sufficient indicator for the Wenchang Formation source in the eastern Pearl River Mouth Basin.
因此，4-甲基甾烷的存在不能作为判识珠江口盆地东部油源主要是文昌组的唯一证据。
This article has studied the optimization of the right synthetic, reaction terms to methyl - a - benzene ethanol and improvement of products yield, have looked for a fast but effectual synthetic way.
本文对对甲基-a -苯乙醇的合成、反应条件的优化及产品收率的提高进行了较为系统的研究，寻找到一条快速而行之有效的合成途径。
It works largely by altering the methylation patterns "the addition or subtraction of methyl groups" around a gene, but not the DNA sequence itself.
表观遗传主要通过基因的甲基化模式的来起作用，而不是DNA序列。
Methyl tertiary butyl ether (MTBE) is a new gasoline additive used to increase gasoline octane value and decrease the exhaust of some harmful pollutants, but there is still debate on its toxicology.
甲基叔丁基醚(MTBE)是一种新型的汽油添加剂，常用来提高汽油辛烷值和减少汽车尾气中有害物质的排放。
The control effect of pesticide 35% phosfolan-methyl EC for mangold flea beetle was 79.2%, but it couldn't control subterranean insect pests.
杀虫剂35%甲基硫环磷乳油叶面喷施对跳甲的防效为79.2%，对地下害虫几乎无效。
The strain was selected with no insecticide, could also prohibit resistant development to cyhalothrin, but the ratio of decline was lower than pirimiphos-methyl selected.
不用杀虫剂筛选对氯氟氰菊酯的抗药性也有显著下降，但下降的速率低于甲基嘧啶磷筛选。
The strain was selected with no insecticide, could also prohibit resistant development to cyhalothrin, but the ratio of decline was lower than pirimiphos-methyl selected.
不用杀虫剂筛选对氯氟氰菊酯的抗药性也有显著下降，但下降的速率低于甲基嘧啶磷筛选。
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