单词	concave bottom
释义	concave bottom 凹板分组,凹底
随便看	ancient formula screening ancient fortune-telling ancient friction ancient fu ancient full-length novels ancient furniture ancient Gaoliang ancient garden ancient garden, historical garden Ancient gardens Ancient gardens in centralGuangdong Province ancient gate towers in Nantong ancient gene duplication ancient geography ancient geology ancient geomorphy resuming ancient geotherm ancient geothermal system ancient german ancient giant bells ancient ginkgo population ancient glaciation ancient glass ancient glass compound eye-bead ancient glasses