（这不就是“挣挣挣。屎”么。。。）急速上升的压力增加了颈动脉血液回流的阻力，并且没有完全闭合的膜瓣使得木有氧气的静脉血返回了脖子。

The increased pressure increases the resistance to blood flowing down the jugular veins, and insufficient valves may allow deoxygenated blood to push back up the neck.

youdao

（这不就是“挣挣挣。屎”么。。。）急速上升的压力增加了颈动脉血液回流的阻力，并且没有完全闭合的膜瓣使得木有氧气的静脉血返回了脖子。

The increased pressure increases the resistance to blood flowing down the jugular veins, and insufficient valves may allow deoxygenated blood to push back up the neck.

youdao