2 sentences

1. 绝不能失掉信心。

   jué bù néng shī​diào xìn​xīn.

   You must never lose confidence.

   Source: Dong Chinese Dictionary

2. 我们不能失掉这个大好机会。

   wǒ​men bù néng shī​diào zhè gè dà​hǎo jī​huì.

   We cannot lose this great opportunity.

   Source: Dong Chinese Dictionary