常見例句Many formulas appeared in literature since DuBoys(1879)presented his tractive force relation. 自杜波阿（1879）提出他的拖曳力關(guān)系式以來，文獻中已經(jīng)出現(xiàn)了許多公式。Many formulas appeared in literature since DuBoys(1879)presented his tractive force relation 自杜波阿(1879)提出他的拖曳力關(guān)系式以來，文獻中已經(jīng)出現(xiàn)了許多公式。 返回 Duboys