本底计数 běn dǐ jì shù

DEFINITIONS

  1. background count

CHARACTERS

本 běn
HSK 1
root, origin, source; basis
底 dǐ
HSK 4
bottom, underneath, underside
计 jì
HSK 4
plan, plot; stratagem; scheme
数 shù
HSK 3
number; several, count; fate