䃤sù

 [书] （黑色的磨刀石） black whetstone

• bolivar
• bolivar，simon
• bolivia
• bolivia，republic of
• bollandists
• bollon
• boll weevil
• bollworm(或pink bollworm)
• boll，heinrich
• bologna
• bologna，giovanni da
• bolograph
• bolshevik
• bolsheviks
• bolshoi ballet
• bolshy
• bolster
• bolt
• bolted:
• bolter
• bolting-hutch
• bolton
• boltzmann constant
• boltzmann，ludwig eduard
• bolt，robert oxton