mull over
consider or think about sth．对…琢磨；思考
He's asked for a bit more time to mull over my proposal．他要求给他点时间来考虑我的提议。
He wanted the the chance of mulling over his conclusions about the subject．他希望有机会仔细考虑一下他对这个问题的结论。
He mulled the idea over in his mind．他脑子里反复思考这个主意。