单词	无敢
释义	无敢 wú gǎn不敢。
随便看	density gradient sedimentation equilibrium density gradient sedimentation method density gradient sedimentation velocity density gradient separation density gradient tube density-gradient tube density gradient zonal centrifugation density grading densitygroup index Density hierarchical clustering density hydrometer density hypothesis densityi density imbalance density impulse density-independent density-independent controls density independent factor density-independent factor densityindependent natural selection density independent pixel density index density index of resources density indicating meter density indicator