• 1. The Thumbtack: 图钉
• 2. The presacral haemostatic thumbtack projector: 骶前止血钉发射器

• 1.The thumbtack pricked his index finger.
  大头针扎了他一下手指。
  dict.yoduao.com
• 2.I press the thumbtack into the board with thumb.
  我用大拇指将图钉按在木板上。
  dict.yoduao.com
• 3.Someone pulls the thumbtack out of the tire, which makes it hard for the owner to find where the hole is.
  有人按了图钉再拔下来，这样车主找不到窟窿在哪儿，补胎时更困难。
  dict.yoduao.com

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