正当

为了wèile正当zhèngdāng目的mùdì可以kěyǐ不择手段bùzéshǒuduàn。

The end justifies the means.

正当zhèngdāng他tā从cóng学校xuéxiào回来huílai的de时候shíhou，我wǒ遇见yùjiàn了le他tā。

I met him just as he was coming out of school.

正当zhèngdāng我wǒ准备zhǔnbèi进jìn浴缸yùgāng的de时候shíhou，汤姆Tāngmǔ来lái拜访bàifǎng我wǒ。

Just as I was about to get into the bathtub, Tom dropped by for a visit.

为了wèile正当zhèngdāng目的mùdì并非bìngfēi总是zǒngshì可以kěyǐ不择手段bùzéshǒuduàn。

The end does not always justify the means.