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。
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。
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。
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。
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。
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。
Chief cells make and secrete pepsinogen.
主细胞制造和分泌胃蛋白酶原。
The mucous cells secrete acid mucopolysaccharides.
黏液细胞分泌酸性黏多糖。
They also secrete a waxy, transparent substance called cutin.
它们还分泌蜡质的透明物质，称作角质。
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。
Many bacteria secrete AHLs, and simultaneously absorb them from their surroundings.
许多细菌分泌该物质，并且与此同时从周围的环境中吸收这种物质。
Some plant species, such as the Lima bean, secrete a nectar that ants find delicious.
一些植物种类，如利马豆，分泌一种蚂蚁感到美味的花蜜。
Starting at puberty, hormones stimulate them to continuously secrete a fatty sweat.
汗腺在青春期由于激素刺激持续分泌一种脂性汗。
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。
The sticky saliva of the flicker is alkaline perhaps to counteract the formic acid that ants secrete.
唾液黏而呈碱性，可能用以中和蚂蚁的蚁酸。
Neurons that reach a particular destination switch on genes that allow them to secrete a nerve growth hormone.
达到特殊部位的神经元可以打开让他们分泌神经生长激素的基因。
The claim is that people living in unequal societies secrete less oxytocin, hence they have lower levels of trust.
作者认为生活在不平等社会中的人们分泌催产素的数量会减少，于是他们彼此间的信任感也会降低。
The impressively named chief cells secrete pepsinogen which, when it mixes with stomach acid, becomes an enzyme called pepsin.
而令人印象深刻的主细胞则分泌胃蛋白酶原，当它与胃酸混合时，就形成一种酶，叫做胃蛋白酶。
Diatoms already secrete silica by exocytosis-a biological process by which cells direct secreted material outside the cell walls.
硅藻已经通过胞外分泌二氧化硅，这是细胞直接把物质分泌出细胞壁的一个生物过程。
The bacterium can also secrete chemicals that inhibit fungal growth, as well as hormones that stimulate the growth of its host plants.
这种细菌也能够分泌抑制真菌生长的化学物质，同时，它还能产生促进宿主植物生长的激素。
This rare and expensive food is actually made from the jellylike saliva that swifts (a type of bird) secrete as they line their nests.
这种稀有而昂贵的食品实际上就是由燕子搭建鸟巢时分泌出的晶状唾液制成的。
All types of oysters (and, indeed, many other shelled molluscs) can secrete pearls, but those from edible oysters have no market value.
所有种类的牡蛎(实际上也包括其他许多有壳的软体动物)都能分泌出珍珠，但是可食用的牡蛎出产的珍珠没有市场价值。
Wood decay fungi, such as Trichoderma sp., after they attach themselves to the surface, secrete a whole family of cellulolytic enzymes.
木材腐朽真菌，如木霉，在它们附着在表面后，可分泌全部种类的纤维素酶。
This rare and expensive food is actually made from the jelly like saliva that swifts (a type of bird) secrete as they line their nests.
这种稀有而昂贵的食品实际上就是由燕子搭建鸟巢时分泌出的晶状唾液制成的。
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。
Endothelial cell is not only an important functional interface, but also secrete vasoactive peptides that regulate the function of vessels.
内皮细胞不但是一重要功能性界面，还能分泌多种生物活性因子调节血管功能。
The immune system - a network of cells, tissues and biochemicals they secrete - defends the body against viruses, bacteria and other invaders.
免疫系统由免疫细胞、免疫组织和它们所分泌的生化物质构成，它保护着身体不受病毒、细菌和其他入侵者的干扰。
The immune system - a network of cells, tissues and biochemicals they secrete - defends the body against viruses, bacteria and other invaders.
免疫系统由免疫细胞、免疫组织和它们所分泌的生化物质构成，它保护着身体不受病毒、细菌和其他入侵者的干扰。
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