needle-gun

例句：

1. 1. The doctor gave him a needle-gun to numb the pain.
   医生给了他一支针枪来麻醉疼痛。
2. 2.She used a needle-gun to remove her stitches.
   她用针枪把缝线取了出来。
3. 3. The nurse handed me a needle-gun to inject the medicine.
   护士递给我一支针枪，让我注射药物。