how long

    　英[haʊ lɒŋ]   美 [haʊ lɔːŋ]

    　conj.

    　多长时间

    　例句

    　How long have you been in this game?

    　你干这行当多长时间了？

    　How long do you think this storm will last?

    　你看这暴风雨会持续多久？

    　It‘s difficult to judge how long the journey will take.

    　很难估计这次旅行要花多长时间。