A third is certain basic chemicals such as carbon, oxygen and nitrogen.
第三种是某些基本的化学物质，如碳、氧和氮。
Most scientists say life’s basic chemicals formed on Earth.
绝大多数科学家认为，构成生命物质基础的化学元素都来自地球本身。
Ammonia has been one of the more difficult basic chemicals to synthesize.
氨曾是一个较难合成的基本化工原料。
Alcohol is the basic material of beverage, wine and chemicals etc.
酒精是饮料、酒类及化工产品的基本原料。
Alcohol is the basic material of beverage, wine and chemicals etc.
酒精是饮料、酒类及化工产品的基本原料。
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