1. 由于;为了;因为…的缘故
    If you do something for the sake of something, you do it for that purpose or in order to achieve that result. You can also say that you do it for something's sake .

    e.g. Let's assume for the sake of argument that we manage to build a satisfactory database...
           为了便于讨论，不妨假定我们成功地建立了一个令人满意的数据库。
    e.g. For the sake of historical accuracy, please permit us to state the true facts...
           为忠于历史，请允许我们阐述真正的事实。

2. 为…本身的缘故;鉴于…本身的价值
    If you do something for its own sake, you do it because you want to, or because you enjoy it, and not for any other reason. You can also talk about, for example, art for art's sake or sport for sport's sake .

sake的解释

    e.g. Economic change for its own sake did not appeal to him...
           经济变化本身对他并没有吸引力。
    e.g. I just like car trips for their own sake.
           我只是单纯地喜欢驾车旅行。

3. 看在…份上;为了帮助(某人)
    When you do something for someone's sake, you do it in order to help them or make them happy.

sake什么意思

    e.g. I trust you to do a good job for Stan's sake...
           我拜托你看在斯坦的份上好好干。
    e.g. Linda knew that for both their sakes she must take drastic action.
           琳达知道，为了他俩，她必须断然行事。

4. (用于加强请求、疑问的语气或表示厌烦、恼怒)看在上帝份上，天哪，行行好，拜托
    Some people use expressions such as for God's sake ,for heaven's sake ,for goodness sake, or for Pete's sake in order to express annoyance or impatience, or to add force to a question or request. The expressions 'for God's sake' and 'for Christ's sake' could cause offence.

    e.g. For goodness sake, why didn't you ring me?...
           天哪，为什么你不给我打电话？
    e.g. You've got a computer system, for heaven's sake.
           天啊，你已经装了计算机系统。