Root exudation of wheat, corn, broad bean and pigeon pea mainly include organic acid, phenol, hydrocarbon, grease, ketone, mellow, amide, benzene, aldehyde and thiazole et al.
小麦、玉米、蚕豆和鹰咀豆根分泌的主要类型有有机酸、酚、烃、脂、酮、酰胺、醇、苯、醛和噻唑。
At the same time, some other oxycompound groups, such as carbonyl group, aldehyde group and ketone group, appear or increase with temperature rising.
与此同时，醛、酮、酯类羰基、芳香酮、醛类羰基等类含氧基团或者从无到有，或者官能团数量不断增加。
Pollutants such as aldehyde and ketone, among major pollutants in atmosphere environment, are strictly limited by every nation for their discharges because of their high toxicity and numerous sources.
醛、酮类污染物是环境中的主要污染物之一，其来源广、毒性大，各国对其排放都进行了严格的限制。
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