| 例句 |
concavitynoun a sunken area forming a separate spacewater collected in a shallow concavity on the floor of the cave cavity, dent, depression, dint, hole, hollow, indentation, indenture, pit, recess burrow, cave, cavern, ditch, excavation, furrow, groove, gutter, trench, troughbasin, bowl, valleyalcove, cleft, niche, nook, opening, socketalveolus, dimple, gouge, impression, imprint, notch, pocketborehole, chuckhole, crater, posthole, pothole, sinkhole, wallow, water hole, wellabyss, chasm, gulf, vacuity, vacuum, void bulge, camber, convexity, jut, projection, protrusion, protuberance hill, mound, risebump, bunch, hump, lump, pimple, swell, swelling, tumor in the 15th century |