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

Pou sto \Pou sto\ (p[=oo] st[=o]; pou st[=o]). [Gr. poy^ stw^
   where I may stand; -- from the reputed saying of Archimedes,
   ``Give me where I may stand and I will move the whole world
   with my steelyard.'']
   A place to stand upon; a locus standi; hence, a foundation or
   basis for operations.