A decade ago most ethylene in North America was made using naphtha, an oil derivative: it is this process that has propylene as its by-product.
十年前，北美的大多数乙烯是石油脑(一种石油衍生物)所制：其生产过程所产生的副产物正是丙烯。
Instead, when a company or an investor wants to buy a derivative contract for, say, oil or wheat or securitized mortgages, an order is placed with a trader at a bank.
当一家公司或者一个投资者想买一份衍生产品合同，例如石油或者小麦或者担保抵押，其买单是在一家银行的交易员那里。
To this end an aspartic acid derivative and a fatty acid ester of a polyhydric alcohol are incorporated as additives in a base oil of e. g. mineral oil or synthetic oil type.
为此，在例如矿物油或合成油类型的基础油中加入了作为添加剂的天门冬氨酸衍生物和多元醇的脂肪酸酯。
The structures and compositions of castor oil and its ethoxylate derivative have been characterized by means of NMR and IR spectroscopy and MS spectrometry.
用核磁共振波谱、质谱和红外光谱表征了蓖麻油和非离子表面活性剂聚氧乙基蓖麻油的结构特征和它们的组成。
Studies on the cleansing property in the laundry powder by using the derivative of glycerin from the drainage oil saponification through the application of the detergency tests are also carried out.
采用洗涤去污实验，研究地沟油皂化的副产物甘油在洗衣粉中的洗涤性能。
The thermal weight loss of asphaltine in the pitch road building oil modified with different additives is studied with derivative thermo - gravimetric analyzer in inert atmosphere.
在惰性气氛中，利用差热分析仪研究了不同添加剂改质煤沥青筑路油中沥青质的热失重情况。
An edible health oil contains edible oil 100 weight portions and oil soluble tea polyphenol derivative 0.01-10 portions and may also contain assistant 0.001-0.1 portion.
一种含茶多酚油（脂）溶性衍生物的保健食用油，其特征是由食用油100份（重量）和茶多酚油（脂）溶性衍生物0．01～10份组成，还可以含有助剂0．001～0.1份。
A fresh and light gel-cream, combining Organic Immortelle Essential Oil with Daisy Extract and Vitamin C Derivative, strategically tackles the origin of dark spots by reducing melanin production.
清爽轻盈的啫喱霜，糅合有机蜡菊精华油、雏菊精华及维他命C衍生物，有效打击色斑根源，阻截黑色素形成，令肤色亮白均匀。
A fresh and light gel-cream, combining Organic Immortelle Essential Oil with Daisy Extract and Vitamin C Derivative, strategically tackles the origin of dark spots by reducing melanin production.
清爽轻盈的啫喱霜，糅合有机蜡菊精华油、雏菊精华及维他命C衍生物，有效打击色斑根源，阻截黑色素形成，令肤色亮白均匀。
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