1. 明确的；确切的
    You use precise to emphasize that you are referring to an exact thing, rather than something vague.

    e.g. I can remember the precise moment when my daughter came to see me and her new baby brother in hospital...
           我能清楚地回想起我女儿来医院看我和她刚出生的弟弟的那一刻。
    e.g. The precise location of the wreck was discovered in 1988...
           残骸的确切位置是在1988年发现的。

2. 精确的；准确的
    Something that is precise is exact and accurate in all its details.

    e.g. They speak very precise English...
           他们讲一口非常地道的英语。
    e.g. He does not talk too much and what he has to say is precise and to the point.
           他话不多，但他说的话既准确又中肯。

3. 确切地说；准确地说
    You say 'to be precise' to indicate that you are giving more detailed or accurate information than you have just given.

    e.g. More than a week ago, Thursday evening to be precise, Susanne was at her evening class...
           一个多星期以前，确切地说是周四晚上，苏珊在夜校上课。
    e.g. The restaurant in which we ate that night had more people in it at 11pm, 51 more to be precise, than it did at 10pm.
           那天晚上我们去吃饭的那家餐馆晚上11点时比10点时人更多，准确地说多了51人。