5 sentences

1. 我们将共同面对未知。

   wǒ​men jiāng gòng​tóng miàn​duì wèi​zhī.

   We will face the unknown together.

   Source: OpenSubtitles

2. 这是一个未知的领域。

   zhè shì yī gè wèi​zhī de lǐng​yù.

   This is an unknown territory.

   Source: Dong Chinese Dictionary

3. 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

4. 古往今来，人们对未知世界始终充满着好奇。

   gǔ wǎng jīn​lái, rén​men duì wèi​zhī shì​jiè shǐ​zhōng chōng​mǎn zhe hào​qí.

   Throughout history, people have always been curious about the unknown world.

   Source: Dong Chinese Dictionary

5. 未来的经济走向对他而言就像是一片未知的谜团。

   wèi​lái de jīng​jì zǒu​xiàng duì tā ér​yán jiù xiàng​shì yī piàn wèi​zhī de mí​tuán.

   The future economic trend is like an unknown mystery to him.

   Source: Dong Chinese Dictionary