3 sentences

1. 恐有不测，我们还是尽早做好准备。

   kǒng yǒu bù​cè, wǒ​men hái​shi jǐn​zǎo zuò hǎo zhǔn​bèi.

   Fearing the unexpected, we should prepare as early as possible.

   Source: Dong Chinese Dictionary

2. 我们要做好准备，以防万一发生不测。

   wǒ​men yào zuò hǎo zhǔn​bèi, yǐ​fáng wàn​yī fā​shēng bù​cè.

   We must be well-prepared in case of any unforeseen circumstances.

   Source: Dong Chinese Dictionary

3. 天有不测风云，人有旦夕祸福。

   tiān yǒu bù​cè fēng​yún, rén yǒu dàn​xī​huò​fú.

   Fortune is as unpredictable as the weather, and life is full of unexpected turns.

   Source: Dong Chinese Dictionary