简述了颗粒污泥的形成机理、形成过程、影响因素与抑制其生长的物质。
The formation mechanism, formation course, influence factors and the matter of restraining growth of granular sludge were described briefly in this paper.
能够减缓植物生长的物质，例如植物激素脱落酸和乙烯(乙烯)。往往生长抑制剂在非常低的浓度下便可产生作用。
Growth inhibitor a substance that slows the growth of a plant, for example the plant hormones ABSCISIC ACID and ETHYLENE (ethane), which act at very low concentrations.
这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。
These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
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