sperm         
noun uk/spɜːm/ us/spɝːm/  sperm or sperms
 [ C ]精子 
a sex cell produced by a man or male animal
  In human reproduction, one female egg is usually fertilized by one sperm. 在人类生殖过程中,通常是一个精子使一个卵子受精。 
  [ U ]精液(semen的非正式说法) 
informal for semen  (= the liquid produced by the male sex organs that contains sperm)