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采用1,4- 丁二醇 、 马来酸酐及十八醇为主要原料,合成出一种双子表面活性剂1, 4- 丁二醇双琥珀酸十八醇双酯磺酸钠.A new type gemini surfactant was synthesized from 1,4 - butanediol , maleic anhydride and 1 - octadecanol.研究了加入聚对苯二甲酸丁二醇酯(PBT) 对酚醛塑料的增韧改性.A phenolic resin was ...
2026年03月08日
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There is nothing in the rules of grammar to suggest that ending a sentence with a preposition is wrong.语法规则中并没有规定句子以介词结尾是错误的。...the difference between Sanskrit and English grammar.梵文语法与英文语法的区别Beginners are too apt to mak...
2026年03月08日
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She watches him plane the surface of a walnut board.她看着他刨平一块胡桃木板。The stool comes in several sizes in walnut or mahogany.凳子有几种尺寸，材质分胡桃木和红木两种。Black walnut is extremely sensitive to damage from late spring frosts.黑胡桃对春天晚霜的危...
2026年03月08日
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The organization publishes a regular digest of environmental statistics.该组织定期出版一份环境统计数据摘要。The newspaper publishes a profile of a leading sportsman every week.该报每周刊登一篇关于一名优秀运动员的简介.Today our paper publishes its 10000 th nu...
2026年03月08日
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“落水洞”的拼音为：luò shuǐ dòng...
2026年03月08日
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“防范”的拼音为：fáng fàn...
2026年03月08日
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n.儿茶酚，苯邻二酚...
2026年03月08日
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“协约”的拼音为：xié yuē...
2026年03月08日
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habit的音标：habit的英式发音音标为：['hæbɪt]habit的美式发音音标为：['hæbɪt]...
2026年03月08日
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“一心”的反义词：二心, 分心。...
2026年03月08日
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run through的音标：run through的英式发音音标为：[rʌn θru:]run through的美式发音音标为：[rʌn θru]...
2026年03月08日
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Language is something which fundamentally distinguishes humans from animals.语言是将人类与动物区分开来的基本特征。What distinguishes homo sapiens from every other living creature is the mind.智人和其他生物的区别在于大脑。He has that je ne sais quoi that ...
2026年03月08日
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He easily overcame Garcia, Saturday's conqueror of Ernie Els.他轻松战胜了星期六击败厄尼·埃尔斯的加西亚。President Garcia has ordered an airlift of food, medicines and blankets.加西亚总统已经下令空运食品、药物和毛毯。Mr Garcia said his conscience was clear ...
2026年03月08日
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Avional的音标：...
2026年03月08日
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n.卡德摩斯（腓尼基王子）...
2026年03月08日