4 sentences

1. 我沉默了数秒，而后深深吸了一口气。

   wǒ chén​mò le shù miǎo, ér​hòu shēn​shēn xī le yì​kǒu​qì.

   I stayed silent for a few seconds, and then I took a deep breath.

   Source: CCMatrix

2. 消防队员们来了，而后红十字会的也来了。

   xiāo​fáng​duì​yuán men lái le, ér​hòu hóng​shí​zì​huì de yě lái le.

   Firefighters arrived, followed by the Red Cross.

   Source: CCMatrix

3. 你需要控制自己，三思而后行。

   nǐ xū​yào kòng​zhì zì​jǐ, sān​sī'ér​hòu​xíng.

   You need to control yourself and think before you act.

   Source: OpenSubtitles

4. 也许那时他们会三思而后行。

   yě​xǔ nà​shí tā​men huì sān​sī'ér​hòu​xíng.

   Maybe then they'll think twice.

   Source: OpenSubtitles