短語詞組短語Head under water 頭在水下head of water supply 取水頭Keep head above water 勉強(qiáng)度日;不欠債;保持不沉入水中Head of Water 水頭;水柱高度;水位差static head of water 靜水頭;靜力水壓head -water point 水源地fall head of water 降落水頭Head Above Water Synopsis 守衛(wèi)者Head -water forest 水源林 返回 head water