adj.研碎的；思索的
動詞mull的現(xiàn)在分詞形式.
I haven't decided what to do; I'm mulling it over. 我還沒有決定怎么辦，我正在仔細(xì)考慮。
I haven't decided yet; I'm mulling it over in my mind. 我還沒有決定，一直在仔細(xì)考慮。
