If you were to put yourself into a cold environment, we would experience in our vasculature, something known as vasoconstriction.

如果你把自己放在个寒冷的环境中，我们的血管系统就会出现叫做血管收缩的现象。

In another heat-preserving response -- called vasoconstriction -- blood vessels temporarily narrow.

在另为血管收缩的保温反应中， 血管会暂时变窄。

It also constrict blood vessels, and incidentally the vasoconstrictor drug called vasopressin is just ADH.

同时ADH也可以收缩血管，而名为血管升压素的血管收缩类药物其实就是ADH。

My very blood-vessels contracted, making my whole body shrink within itself.

我的血管收缩， 使我的整个体收缩。

It’s thought that this extreme constriction of blood vessels was an evolutionary advantage for humans.

人们认为，这血管的极度收缩是人类的进化优势。

Vessels in your extremities constrict- shunting blood to the body's core.

四肢的血管收缩，将血液分流到体的核心部位。

The vessels feeding your digestive organs constrict, which increases resistance there, so more blood goes to the skeletal muscles in your legs.

喂养消化器官的血管收缩，这增里的阻力，所以更多的血液流向你腿上的骨骼肌。

It's also metabolized by the liver, and cocaine causes capillaries in the mouth and esophagus to constrict, making it harder for it get absorbed.

可卡因被肝脏代谢，也能够导致口腔毛细血管和食管毛细血管的收缩，这使得药物更难被吸收。

Cold temperature can make you feel like you’re having a brain freeze, probably because it’s making the blood vessels inside of your nose constrict.

寒冷的温度会让你感觉大脑冻结，这可能是因为它会使你鼻子内的血管收缩。

Peripheral vasoconstriction is when blood vessels in the extremities constrict, moving blood from the limbs to oxygen sensitive organs like the heart, lungs, and brain.

外周血管收缩是指四肢的血管收缩，将血液从四肢转移到对氧敏感的器官，如心脏、肺和大脑。

One more thing: Aldosterone secretion, combined with blood vessel constriction due to impairment of nitric oxide synthesis — another consequence of this renin-angiotensin-aldosterone system, increases blood pressure.

还有，醛固酮分泌，上因氧化氮合成障碍引起的血管收缩，将导致 RAA 系统活跃带来的另个后果——高血压。

Nicotine causes narrowing of the blood vessels in the outermost layers of the skin, while the chemicals in tobacco smoke damage collagen and elastin, fibres which give the skin its elasticity.

尼古丁会导致皮肤最外层的血管收缩，而烟雾中的化学物质会损害些赋予肌肤弹性的胶原蛋白和弹力蛋白。

In cigarettes, this releases nicotine which is absorbed into your bloodstream through the lungs, causing increased heart rate, constricted blood vessels, release of dopamine in the brain and feelings of alertness.

在香烟中的尼古丁会释放出来。尼古丁通过肺部后被吸入血液中，导致心率快，血管收缩，大脑中的多巴胺被释放出来，因此还可以用来提神。

Also use of certain drugs are risk factors, like cocaine and methamphetamine because these can cause significant vasoconstriction of the placental blood vessels and an abrupt increase in blood pressure, increasing the risk of an abruption.

危险因素还有使用某些药物，如可卡因、脱氧麻黄碱，因为它们会导致胎盘血管的收缩和血压的突然升高，增胎盘剥离的风险。