兩者都可以表示：用他自己的話說,通?？梢曰Q.但是in的方法更為普遍,在英文一些官方表達(dá)中,及詞典中in one's own words 更為普遍些.
例如：
Tom can talk about the festivals in his own words.等于
Tom can talk about the festivals on his own words.
湯姆能用英語流利表達(dá)節(jié)日的相關(guān)知識.