5 sentences

1. 时光易逝，我们要珍惜当下。

   shí​guāng yì shì, wǒ​men yào zhēn​xī dāng​xià.

   Time flies; we must cherish the present.

   Source: Dong Chinese Dictionary

2. 妳应该活在当下。

   nǐ yīng​gāi huó zài dāng​xià.

   You should live in the moment.

   Source: OpenSubtitles

3. 我们应该珍惜当下的每一分每一秒。

   wǒ​men yīng​gāi zhēn​xī dāng​xià de měi yī fēn měi yī miǎo.

   We should cherish every minute and second of the present.

   Source: Dong Chinese Dictionary

4. 时光飞逝，我们要珍惜当下的每一秒。

   shí​guāng fēi​shì, wǒ​men yào zhēn​xī dāng​xià de měi yī miǎo.

   Time flies; we should cherish every second of the present.

   Source: Dong Chinese Dictionary

5. 他听完这番话，当下就愣住了。

   tā tīng wán zhè fān huà, dāng​xià jiù lèng​zhù le.

   He was stunned immediately after hearing these words.

   Source: Dong Chinese Dictionary