6 sentences

1. 他白白浪费了许多时间。

   tā bái​bái làng​fèi le xǔ​duō shí​jiān.

   He wasted a lot of time for nothing.

   Source: Dong Chinese Dictionary

2. 我们不能让他白白牺牲。

   wǒ​men bù néng ràng tā bái​bái xī​shēng.

   We can't let him die in vain.

   Source: OpenSubtitles

3. 我已经白白浪费了一年光阴。

   wǒ yǐ​jīng bái​bái làng​fèi le yī nián guāng​yīn.

   I've wasted a year of my life.

   Source: OpenSubtitles

4. 这么多粮食被白白糟蹋了，真可惜。

   zhè​me duō liáng​shi bèi bái​bái zāo​tà le, zhēn kě​xī.

   It's a pity that so much food was wasted for nothing.

   Source: Dong Chinese Dictionary

5. 这么好的机会白白错过了，真叫人惋惜。

   zhè​me hǎo de jī​huì bái​bái cuò​guò le, zhēn jiào rén wǎn​xī.

   It's a real pity to let such a good opportunity go to waste.

   Source: Dong Chinese Dictionary

6. 看到这么多食物被白白浪费掉，我真感到心痛。

   kàn​dào zhè​me duō shí​wù bèi bái​bái làng​fèi diào, wǒ zhēn gǎn​dào xīn​tòng.

   It really pains me to see so much food being wasted.

   Source: Dong Chinese Dictionary