It’s a crucial if temporarily backward step.

这是水暂时性重要一步。

But it's not pure seawater that comes back out.

但出来并不是纯海水。

Increased blood flow to the brain is helpful.

增加血大脑是有益。

Breathing is one of the mechanisms that facilitate venous return.

呼吸是促进静脉机制之一。

The warm blood flowed back to his face and his hands quickened.

温热血到他脸上， 他手加快了速度。

Eventually, the blood in the venous sinuses drains into the internal jugular vein and returns to the heart.

最终，静脉窦中血至颈内静脉，至心。

Finally, we will make it easier for companies to bring back trillions of dollars that they are now keeping overseas.

最后，我们将使企业数万亿海外资金更加容易。

Too languid to sting, he had the more venom refluent in his blood.

无法刺痛，他血中有更多毒。

What is more, the repatriation of profits by American firms would draw resources away from their subsidiaries abroad.

更为重要是，美国企业利润会将各种资源抽离它们海外分公司。

There he leant over the wall and lowered the lamp, only to behold the vortex formed at the curl of the returning current.

然后他在岸墙上俯身探望，把灯放低，但只能看到浪卷形成漩涡。

Before they had crossed halfway, the water returned in a wave higher than anyone had ever seen, drowning the attackers.

士兵们还没走到一半，高过以往见过水波就淹死了这些进攻者。

Some of the material was carried in by seawater pouring back into the crater from the surrounding Gulf of Mexico.

一些物质由从墨西哥湾附近到巨坑中海水所携带。

Along with the trapped gas that's pumped up to the surface, millions of gallons of flow-back liquid come gushing up.

随着被泵送到地表被困气体，数百万加仑体涌了上来。

Like you kind of scrape the bottom of your pan, you can also see how quickly the water pools back into place.

就像您刮擦锅底一样，您还可以看到水池速度有多快。

And the rate at which veins return blood back to the atria is called venus return, which is pretty easy to remember, right?

静脉血到心房速度叫做静脉心血量，这个很容易记。

It can cause the blood to run back into your throat, which can affect your breathing and might end up in your stomach.

这会导致血到你喉咙，从而影响你呼吸，并可能最终进入你胃部。

The migration of dairy farmers to the north then spread it further, which probably pushed back populations there that didn't have the trait.

奶农向北方迁移，然后进一步扩散，这很可能使那里没有特质人口。

So if a river floods, and then the water recedes, the water goes away from the places where it shouldn't have been back into the river.

因此，如果河泛滥， 然后水退去，水就会从不应该地方走。

Normally, blood makes it back to the heart from all of the tissues and organs through a network of veins that merge over and over.

正常情况下，人体所有组织器官血至心都是通过不断汇合静脉系统完成。

Observers say selling old clothes is a way to bring customers back to the stores – especially young shoppers. But some people also fear that it could hurt businesses.

观察人士表示，出售二手衣服是引顾客商店一种方式，尤其是年轻顾客。但也有一些人担心这会损害企业利益。