adj.凹的n. 凹面；凹线；凹形 副词：concavely名词：concaveness过去式：concaved过去分词：concaved现在分词：concaving第三人称单数：concavesconcaves Adjective curving inward concaves例句 用作形容词(adj.)The palm of one's hand is slightly concave.人的手掌是微凹的。 A cylinder is a hollow tube with a closed...
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