相關(guān)單詞近義詞 foundation 根基, reinforcement 增強(qiáng), groundwork 基礎(chǔ), keystone 拱頂石, bedrock 巖床, leg 腿, footing 立足點(diǎn), substructure 底部構(gòu)造臨近詞underpin 返回 underpinning