[depend on] The cooking time needed depends on the size of the potato. 所需的烹饪时间由土豆的大小而定。[turn on] The plot turns on whether Ilsa will choose her lover or her husband. 故事情节取决于伊尔莎会选择情人还是丈夫。[be contingent on] Whether or not we arrive on time is contingent on the weather. 我们能否准时到,要视天气好坏而定。