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2019冠状病毒疾病(Coronavirus Disease 2019)...
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COVID-19的音标:...
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催化剂的酸度与丁烯-1异构化活性呈线性关系.The relationship between acid amount of the catalysts and activity of the isomerization of 1 - betene was linear....
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6月份的出口额上升了1.5%,创下309.1亿美元的历史最高纪录。Exports in June rose 1.5% to a record $30.91 billion.1978年有884名学生,师生比为1比15。In 1978 there were 884 students at a lecturer/student ratio of 1:15.今年,工厂生产的小轿车可能只有1,500辆。The factory may make a...
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“丁烯-1”的英语可以翻译为:utene-1,a-butalene,ethylethylene ...