底面

underside
【化】 back surface

1.bottomsurface  2.undersurface  3.subface  4.base  5.backsurface  6.basalface  7.baseplate  8.basesurface  9.lowerplane  10.planceer  

底的英语翻译：

a copy kept as a record; base; bottom; end; fundus; the truth of a matter
【医】 base; basement; bases; basi-; basio-; basis; batho-; bathy-; fimdi
floor; fundus; pavimentum; solum

面的英语翻译：

face; surface; cover; directly; range; scale; side
【医】 face; facies; facio-; prosopo-; surface