资料来源 : pyDict

principium的复数形

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Principia \Prin*cip"i*a\, n. pl. [L. principium. See
   {Principle}.]
   First principles; fundamental beginnings; elements; as.
   Newton's Principia.

资料来源 : WordNet®

principia
     See {principium}