4 sentences

1. 他一生都钟情于古典文学。

   tā yī​shēng dōu zhōng​qíng yú gǔ​diǎn wén​xué.

   He has been passionate about classical literature all his life.

   Source: Dong Chinese Dictionary

2. 老先生一生都钟情于传统戏曲的研究。

   lǎo xiān​sheng yī​shēng dōu zhōng​qíng yú chuán​tǒng xì​qǔ de yán​jiū.

   The old gentleman has been devoted to the study of traditional opera all his life.

   Source: Dong Chinese Dictionary

3. 他一生都钟情于航天事业，并为此不懈努力。

   tā yī​shēng dōu zhōng​qíng yú háng​tiān shì​yè, bìng wèi cǐ bù​xiè nǔ​lì.

   He was devoted to the cause of aerospace throughout his life and worked tirelessly toward it.

   Source: Dong Chinese Dictionary

4. 他对比自己大几岁的邻居早已暗暗钟情。

   tā duì bǐ zì​jǐ dà jǐ suì de lín​jū zǎo​yǐ àn'àn zhōng​qíng.

   He has long been secretly in love with his neighbor, who is a few years older than him.

   Source: Dong Chinese Dictionary