A biological, chemical or physical agent in or on food with the potential to cause an adverse health effect.
食品中可能引起潜在健康问题的生物、化学或物理介质。
Surfactant is a kind of chemical agent which can enhance oil recovery greatly and has wide fitness for purpose and development potential.
表面活性剂是提高采收率幅度较大、适用较广、具有发展潜力的一种化学驱油剂。
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