短語詞組短語directly y proportional to 成正比directly proportional function 正比例函數(shù)be directly proportional 成正比vary directly proportional to 和directly proportional to 正比于;成正比;與……成正比Be directly proportional to 成正比;成正比例;與;正比于directly proportional detail 正比例的directly proportional to the amount 數(shù)量成正比directly proportional burning velocity law 燃速正比定律 返回 directly proportional