2 sentences

1. 科学家们终其一生都在探索真理。

   kē​xué​jiā men zhōng​qí​yī​shēng dōu zài tàn​suǒ zhēn​lǐ.

   Scientists spend their whole lives exploring the truth.

   Source: Dong Chinese Dictionary

2. 他终其一生，却发现许多心愿依然未遂。

   tā zhōng​qí​yī​shēng, què fā​xiàn xǔ​duō xīn​yuàn yī​rán wèi​suì.

   He spent his whole life only to find many of his wishes still unfulfilled.

   Source: Dong Chinese Dictionary