1、for the sake of：为了；为了……的利益。

例句：Forthesakeofsimplicity , lets divide the discussion into two parts.

为了方便起见，我们把讨论分成两部分。

2、in the cause of：为了。

例句：Mrs Suzman was delighted to annoy theminthecauseofjustice.

苏兹嫚女士为了正义一定要去烦扰他们。

3、in order to：为了。

例句：They spread disinformationinordertodiscredit politicians.

他们为破坏政治家们的名声故意散布假信息。

4、on behalf of：代表；为了。

例句：He spokeonbehalfofall the members of the faculty and staff.

他代表全体教职员工讲了话。

5、for purpose of：为了。

例句：The flat character is introduced solelyforthepurposeofallowing the round character to show off.

引入扁平字符仅是为了突出圆形字符。