bottomn.底部；底端adj.底部的v.触底；打(基础)bottom mud底层泥浆bottom arm下电极臂bottom ice底冰,锚冰bottom cup底火bottomlandn.洼地；滩地；泛滥地bottom oiln.残余油；油脚bottom net底网bottom log干基原木bottommostadj.最深的(最下面的；最低的；最基本的)bottom mine沉底雷