词汇	ulmin brown
释义	ulmin brown 棕腐质煤
随便看	boundary turbulent velocity boundary type boundary type lubrication boundary umpire boundary umpires boundary unmarked boundary utility boundary value boundary-value boundary value analysis boundary-value analysis boundary value classifying method boundary value component boundary value condition boundary value control boundary value expression boundary value function boundary-value method boundary value observation boundary value observer Boundary value peoblem at resonance boundary value problem boundary-value problem Boundary-value problem boundary value problem at resonance