4二

例句

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1.
Some of the products tested had the U. S. Department of Agriculture organic seal, and none of those contained 1, 4-dioxane.
有些被检验并且盖有美国农业部有机印章的产品中并没有发现含有1,4-二恶烷。
news.dxy.cn
2.
The group said the presence of 1, 4-dioxane poses a health risk and undermines natural and organic claims by some manufacturers.
该组织说，现存的1,4-二恶烷会对健康造成危险，并破坏了一些制造商所宣称的天然有机（的谎言）。
news.dxy.cn
3.
These results indicate that the presence of strong acid sites favors the improvement of both phenol conversion and 2, 4-DTBP selectivity.
这表明强酸中心的出现有利于提高苯酚的转化率和2,4-二叔丁基苯酚的选择性。
www.juhe8.com
4.
The purity of target product was 99% with yield up to 95%.
目标产品纯度99%，相对于2,4-二甲基苯酚收率达到95%以上。
www.ceps.com.tw
5.
In an earlier test, CSC found that many products labeled "natural" or "organic" contained 1, 4-dioxane.
在更早的检测中，CSC发现许多贴有“自然”或“有机”标签的产品中含有1,4-二悪烷。
news.dxy.cn
6.
Optically active 3, 4-diazaphospholane ligands and their application in asymmetric hydroformylation and allylic alkylation reactions.
旋光活性3,4-二甲基磷酸配体及其在不对称羟基化和烯丙基烃化反应中的应用。
www.hcbusinessmedia.com
7.
The synthesis of 1, 4 dioxane from diethylene glycol using p toluene sulphonic acid as a catalyst was discussed.
利用二甘醇为原料，以对甲苯磺酸为催化剂合成了1,4-二氧六环。
www.dictall.com
8.
on the anti-allergy-2, 4 Dinitrochlorobenzene (DNCB) in mice induced by the impact of delayed-type hypersensitivity.
抗过敏汤对2,4-二硝基氯苯（DNCB）诱导的小鼠迟发型超敏反应的影响。
terms.shengwuquan.com
9.
The dichlorophenoxyacetic acid (2, 4-D) can be detected accurately, rapidly and conveniently by these technologies.
实现2,4-二氯苯氧乙酸（2,4-D）的准确、快速、简便的检测。
www.fabiao.net
10.
Catalyzed by 4-dimethylaminepyridine, vitamin E succinate was synthesized with vitamin E and succinic anhydride.
以4-二甲氨基吡啶为催化剂，以维生素E和琥珀酸酐为原料合成维生素E琥珀酸酯。
www.ceps.com.tw