【机】 二冲程引擎, 克拉克循环发动机

A bird in the hand is worth two in the bush

Epton(two-phase) titration

know a thing or two

two-shift operation【经管】

KolmogorovSmirnov two sample test

bivariate distribution【数】;two-dimensional distribution【数】

two-phase simplex method【数】

twoprocess learning theory