3 sentences

1. 青春年少，真令我羡慕。

   qīng​chūn nián​shào, zhēn lìng wǒ xiàn​mù.

   How I envy your youth.

   Source: OpenSubtitles

2. 他年少时负笈远游，遍访名师。

   tā nián​shào shí fù jí yuǎn​yóu, biàn fǎng míng​shī.

   When he was young, he traveled far to study, visiting many famous masters.

   Source: Dong Chinese Dictionary

3. 他年少时就展现出了非凡的数学天赋。

   tā nián​shào shí jiù zhǎn​xiàn chū le fēi​fán de shù​xué tiān​fù.

   He showed extraordinary mathematical talent when he was young.

   Source: Dong Chinese Dictionary