3 sentences

1. 他这种无私奉献的精神值得我们学习。

   tā zhè zhǒng wú​sī fèng​xiàn de jīng​shén zhí​de wǒ​men xué​xí.

   His spirit of selfless devotion is worth learning from.

   Source: Dong Chinese Dictionary

2. 他在遇到困难时得到了很多亲友的无私帮助。

   tā zài yù​dào kùn​nan shí dé​dào le hěn​duō qīn​yǒu de wú​sī bāng​zhù.

   He received a lot of selfless help from relatives and friends when he encountered difficulties.

   Source: Dong Chinese Dictionary

3. 处理这件事情一定要大公无私。

   chǔ​lǐ zhè jiàn shì​qing yī​dìng yào dà​gōng wú​sī.

   This matter must be handled with complete impartiality.

   Source: Dong Chinese Dictionary