3 sentences

1. 在浩瀚的银河系中，地球显得非常渺小。

   zài hào​hàn de Yín​hé​xì zhōng, dì​qiú xiǎn​de fēi​cháng miǎo​xiǎo.

   In the vast Milky Way galaxy, Earth appears very small.

   Source: Dong Chinese Dictionary

2. 浩瀚的宇宙广阔无极，充满了未知的奥秘。

   hào​hàn de yǔ​zhòu guǎng​kuò wú​jí, chōng​mǎn le wèi​zhī de ào​mì.

   The vast universe is infinitely expansive and full of unknown mysteries.

   Source: Dong Chinese Dictionary

3. 站在浩瀚的大海面前，我感到自己非常渺小。

   zhàn zài hào​hàn de dà​hǎi miàn​qián, wǒ gǎn​dào zì​jǐ fēi​cháng miǎo​xiǎo.

   Standing before the vast ocean, I feel very insignificant.

   Source: Dong Chinese Dictionary