13　注射器
syringe /s??r?nd?/
单数部落　一支注射器 a syringe
复数部落　两支注射器 two syringes
会话急救包
把空气排出注射器
expel the air out of the syringe
A：It's dangerous if you haven't expelled the air out of the syringe before you give the patient an injection.
给患者打针之前，你如果没有把空气排出注射器是很危险的。
B：Why's that? Because air will go into the patient's blood?
那是为什么？因为空气会进入患者的血液中吗？
expel /?k?spel/ v. 排出；喷出；驱逐出境
dangerous /?de?nd??r?s/ adj. 危险的
把药吸进注射器
suck the medicine into a syringe
A：Is everything ready?
一切都准备好了吗？
B：Yes. The intern has sucked the medicine into a syringe and is ready to give the injection.