1. The nucleated cell of a spermatozoon. 
   精子的有核的细胞
2. the act of becoming pregnant; fertilization of an ovum by a spermatozoon. 
   怀孕的行为；卵子与精子结合成受精卵的过程。
3. A caplike structure at the anterior end of a spermatozoon that produces enzymes aiding in egg penetration. 
   精子头粒蛋白一种在精子内前端的帽状结构，可产生帮助穿透卵子的酶
4. A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter. 
   卵膜孔一些动物卵细胞覆盖膜上的小孔，精子可由此进入
5. inspection of head and neck 
   望头颈五官

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• 1. 精子颈部
  [医]肩胛骨颈,肩胛颈 neck of sperm...精子颈部 neck of spermatozoon...[医]精子颈 neck of the woods
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