等等，放下注射器——血管里如果出现一个大气泡，则会致人死命。
Wait, put down that syringe—a large air bubble in a blood vessel can kill you.
静脉输液前使用注射贴可有效扩张局部血管和局部镇痛。
Conclusion: injection plaster is effective on local blood vessel distending and local analgesia.
血管分别注射色剂，红色示动脉血，蓝色示静脉血。
Its main artery and vein were injected with red and blue inks respectively.
血管分别注射色剂，红色示动脉血，蓝色示静脉血。
Its main artery and vein were injected with red and blue inks respectively.
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