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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。

6·The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.

在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。

7·The sweat glands secrete water.

汗腺分泌汗液。《柯林斯英汉双解大词典》

8·The glands on its hind feet can secrete poisonous fluid.

它后脚上的腺体能分泌出毒液来。

9·But all women, not just mothers, secrete oxytocin under pressure.

可是所有女性，不单单是母亲们，都会在压力下分泌出催产素。

10·Poison dart frogs secrete lipophilic alkaloid toxins through their skin.

毒镖蛙在身体皮肤下隐藏着亲脂性的碱性毒液。