基本解釋adj.(=costly)珍貴的；昂貴的同根派生 costful相關(guān)詞英漢例句用作形容詞 (adj.)The most costful friendly sentiment is look like North Star , eternal and distant as well.最珍貴的友情像北極星一樣，永恒而又遙遠。costful更多例句