原版英语对话：Having a Blood Test in the Lab(2)

A: My doctor says that I need a blood test.
B: I can help you with that. Just have a seat and roll up your left sleeve.
A: What are you taking my blood for?
B: Your doctor has requested a check of your white blood count.
A: What information does that give him?
B: If your white blood cell count is off, it could signal an infection somewhere in your body.
A: Is a blood test painful?
B: I am putting a tourniquet¹ on your arm to plump up the vein². It will only feel like a little pin prick³.
A: Oh, my God, that hurts!
B: That was it! Thank you for coming in today.

1 tourniquet   

n.止血器，绞压器，驱血带

参考例句：

• Twist the tourniquet tighter.把止血带扎紧点。
• The tourniquet should occlude venous and lymphatic return.止血带应阻断静脉及淋巴回流。

2 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。

3 prick   

v.刺伤，刺痛，刺孔；n.刺伤，刺痛

参考例句：

• He felt a sharp prick when he stepped on an upturned nail.当他踩在一个尖朝上的钉子上时，他感到剧烈的疼痛。
• He burst the balloon with a prick of the pin.他用针一戳，气球就爆了。