如何使用 "pinhead" 造句

1. C. have a sphincter the size of a pinhead .
C.心情郁闷。
2. One pinhead of the pufferfish poison is sufficient to kill a full grown adult male human .
相当于一针剂量的河豚毒足以使一成年男人丧命。
3. Spotting the light from a tiny planet across astronomical distances is akin to discerning a red-hot pinhead right next to a floodlight from many kilometres away .
要通过天文距离找出小行星上的光线,就如同去找远在几公里外的那临近照明灯旁边炽热的针头。