growth substance
柯林斯詞典
1. N any substance, produced naturally by a plant or manufactured commercially, that, in very low concentrations, affects plant growth; a plant hormone 生長刺激素[botany]
返回 growth substance
1. N any substance, produced naturally by a plant or manufactured commercially, that, in very low concentrations, affects plant growth; a plant hormone 生長刺激素[botany]