1. The lungs of a fetus secrete a liquid that mixes with its mother's amniotic fluid. 胎儿的肺部会分泌一种能与母亲的羊水混合的液体。
2. Farmer ants secrete antibiotics to control other fungi that might act as "weeds", and spread waste to fertilise the crop. 农民蚂蚁分泌抗生素来控制其他可能充当“杂草”的真菌，并传播排泄物来给作物施肥。
3. We know they smear a liquid on the tube, but we don't know where they secrete it from or what its chemical composition is. 我们知道它们在管上涂抹了一种液体，但我们不知道它们从哪里分泌出这种液体，也不知道它的化学成分是什么。
4. Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras. 毒蛇是一种分泌有毒物质或毒液的动物，像蝰蛇科的蛇或眼镜蛇。
5. Many carnivorous plants secrete enzymes to penetrate the hard exoskeleton of insects, so they can absorb nutrients from inside their prey. 许多食肉植物分泌酶以穿透昆虫坚硬的外骨骼，以从猎物体内吸收营养。
