Because the oil is used as a reserve nutrient-like fat-diatoms have evolved no mechanism to secrete it .
由于油的作用是营养储备就象脂肪似的所以硅藻没有进化出分泌油份的机制。
Female beewolf digger wasps cultivate symbiotic streptomyces bacteria in unique antennal glands and secrete them into their larval brood cells .
雌性狼蜂掘土蜂在其独特的触角腺里培育共生链霉菌,并将它们分泌到其幼虫的巢房中。
The body 's response to prolonged periods of stress is to secrete increasing amounts of cortisol , a hormone that marshals resources to cope with crises .
长时期的压力导致身体做也反应,增加皮质醇的分泌,这是一种组织运用资源以应对危机的激素。
They secrete things into their environment and absorb the products of digestion back into themselves .