動詞 mull:

1. reflect deeply on a subject
   同義詞：chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculate
2. heat with sugar and spices to make a hot drink
   同義詞：mull

1. I haven't decided what to do; I'm mulling it over.
   我還沒有決定怎么辦，我正在仔細考慮。
2. I haven't decided yet; I'm mulling it over in my mind.
   我還沒有決定，一直在仔細考慮。