时差N小时 你对静脉了解多少(下)

Varicose veins² in the legs occur when the valves in a vein¹ near the surface of the skin malfunction³.

当皮肤表面下的血管的阀门不起作用时，腿上的静脉曲张开始显现。

Valves usually keep blood from flowing backwards⁴ in the vein once it's been pumped towards the heart.

阀门的作用是防止有心脏送出的血液回流。

When the valves don't work properly, blood backs up the vein, causing it to swell⁵ and twisr.

当阀门不正常工作时，血液不能流动，导致血管膨胀和扭结。

Although varicose veins are usually associated with senior citizens, not every older person hasthem.

虽然静脉曲张多发生在老年人身上，但是不是每个老年人都患有这种病。

Weak valves are often inherited, and can also be caused by wearing clothing that squeezes the legs and veins too tightly.

脆弱的阀门通常是遗传的，或者身上的衣服把腿和血管勒的太紧导致的。

Varicose veins may seem unsightly, but they're not usually a cause for major concern.

静脉曲张是很难看的，但是它们通常不会引起强烈的关注。

If you have them and want to do something about it.

然而，如果你有这种病并想要治疗。

Treatments range from wearing strong support stockings to surgery.

治疗方法包括从穿修复性的长筒袜到做外科手术。

1 vein   

n.血管，静脉；叶脉，纹理；情绪；vt.使成脉络

参考例句：

• The girl is not in the vein for singing today.那女孩今天没有心情唱歌。
• The doctor injects glucose into the patient's vein.医生把葡萄糖注射入病人的静脉。

2 veins   

n.纹理；矿脉( vein的名词复数 )；静脉；叶脉；纹理

参考例句：

• The blood flows from the capillaries back into the veins. 血从毛细血管流回静脉。 来自《简明英汉词典》
• I felt a pleasant glow in all my veins from the wine. 喝过酒后我浑身的血都热烘烘的，感到很舒服。 来自《简明英汉词典》

3 malfunction   

vi.发生功能故障，发生故障，显示机能失常

参考例句：

• There must have been a computer malfunction.一定是出了电脑故障。
• Results have been delayed owing to a malfunction in the computer.由于电脑发生故障，计算结果推迟了。

4 backwards   

adv.往回地，向原处，倒，相反，前后倒置地

参考例句：

• He turned on the light and began to pace backwards and forwards.他打开电灯并开始走来走去。
• All the girls fell over backwards to get the party ready.姑娘们迫不及待地为聚会做准备。

5 swell   

vi.膨胀，肿胀；增长，增强

参考例句：

• The waves had taken on a deep swell.海浪汹涌。
• His injured wrist began to swell.他那受伤的手腕开始肿了。