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Research and development for fhe production of pyrocatechol and hydroquinone by reaction of phenol with hydrogen peroxide and percarboxylic acid as hydroxylating reagent are introduced.

着重介绍用过氧化氢过氧化羧酸作基化剂,使基化生成邻的研究开

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The metol content and the hydroquinol content in developer solution were analyzed by potential spectrum method.During this analysis, two components were continuously titrated at the same time.

采用一种新的化学分析方法电位波谱法分析显影液中的米吐尔的含量,在研究过程中实现了这两种成分的连续滴定分析。

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CROS, Crosby, crosier, croslet, cross, cross-, cross bar, cross beam, cross check, cross current,

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3G, 401(K), a,

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VOA Special 2014年7月合集

She uses a cream that is made from carrots and not the strong chemical, hydroquinone.

她使用胡萝卜制成的一种面霜,不含强化学物质对苯二酚

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VOA常速英语_非

When used medically, hydroquinone can be an effective treatment for skin discoloration.

学上使用对苯二酚可以有效地治疗皮肤变

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VOA常速英语_非

The East African Legislative Assembly last week passed a resolution on the region-wide ban of hydroquinone's manufacture and importation.

上周,东非立法会议通过了一整个地区禁止对苯二酚生产和进口的决议。

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VOA常速英语_非

Critics point out the ban have failed to stop smuggled hydroquinone products from being sold openly.

批评人士指出,禁令未能阻止走私对苯二酚产品公开销售。

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VOA常速英语_非

Skin whitening products often use high concentration of hydroquinone which can cause skin problems or mix with other bleaching chemicals become toxic.

皮肤美白产品经常使用高浓度的对苯二酚,这会导致皮肤问题,或与其他漂白化学品混合,从而产生毒性。

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cross linkage, cross out, cross product, cross reference, cross road, cross section, cross sectional, cross street, cross talk, cross walk,

相似单词


3G, 401(K), a,
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