词汇	汞合金充填
释义	汞合金充填医amalgam filling
随便看	backward dictionary backward difference backward-difference backward difference function backward difference method backward-difference method backward difference operator backward-difference operator backward difference quotient backward different approximation method backward differential equation backward differentiation method backward differentition method backward-differnece formula backward diffractive pattern Backward diffusion backward diode backward dip backwarddirected backward directed backward-directed backward explicit congestion notification lt backward extension backward direction backward dislocation