boundary bay边界海湾boundaryn.边界；分界线boundary stripping ratio境界剥采比boundary-valui problem边界值问题boundary valve condition边值条件boundary element methods边界元(素)法boundary between muscles分肉boundary of the air mass气团的边界boundary electrophoresis界面电泳boundary layer turbulence边界层湍流boundary diffraction wave边界衍射波boundary layer transition边界层过渡区,边界层过渡,边界层转捩