| 例句 |
undersurfacenoun the side or part facing downward from somethingpainted the undersurface of the plane blue bottom, underbelly, underbody, underpart, underside belly, sole, toebase, floor, foot, ground, seat, underpinningundercarriage face, top acme, apex, climax, crest, crown, culmination, height, high-water mark, meridian, peak, pinnacle, roof, summitcusp, head, point, tip, tip-top, zenith in 1733 |