2 sentences

1. 没能见到他最后一面，是我此生最大的憾。

   méi néng jiàn​dào tā zuì​hòu yī miàn, shì wǒ cǐ​shēng zuì dà de hàn.

   Not being able to see him one last time is the greatest regret of my life.

   Source: Dong Chinese Dictionary

2. 我此生最大的愿望就是带父母去环游世界。

   wǒ cǐ​shēng zuì dà de yuàn​wàng jiù shì dài fù​mǔ qù huán​yóu shì​jiè.

   My greatest wish in life is to take my parents to travel around the world.

   Source: Dong Chinese Dictionary