2 sentences

1. 越是困难，越是要努力。

   yuè shì kùn​nan, yuè​shì yào nǔ​lì.

   The more difficult it is, the harder you must work.

   Source: Dong Chinese Dictionary

2. 越是遇到紧急的情况，我们越是要保持冷静。

   yuè​shì yù​dào jǐn​jí de qíng​kuàng, wǒ​men yuè​shì yào bǎo​chí lěng​jìng.

   The more urgent the situation, the more we need to stay calm.

   Source: Dong Chinese Dictionary