| 例句 |
concavitiesnounpl. of concavity a sunken area forming a separate spacewater collected in a shallow concavity on the floor of the cave cavities, dents, depressions, dints, holes, hollows, indentations, indentures, pits, recesses burrows, caverns, caves, ditches, excavations, furrows, grooves, gutters, trenches, troughsbasins, bowls, valleysalcoves, clefts, niches, nooks, openings, recesses, socketsalveoli, dimples, gouges, impressions, imprints, notches, pocketsboreholes, chuckholes, craters, postholes, potholes, sinkholes, wallows, water holes, wellsabysses, chasms, gulfs, vacuities, vacuums(or vacua), voids bulges, cambers, convexities, juts, projections, protrusions, protuberances hills, mounds, risesbumps, bunches, humps, lumps, pimples, swellings, swells, tumors |