贝尔定律(脊髓神经前根为运动根,后根为感觉根)

bell

detonator, bell signal, emergency signal, blast of the whistle, danger signal, acoustic

bellshaped distribution

Halesia diptera Ellis; two wing silver-bell

bell-shaped symmetrical curve【数】

bell for Christmas tree

bell-weevil hanger【油气】;casing hanger【油气】

as clear as a bell