2 sentences

1. 毕业后，学生们开始了一段充满挑战的人生征程。

   bì​yè hòu, xué​sheng men kāi​shǐ le yī duàn chōng​mǎn tiǎo​zhàn de rén​shēng zhēng​chéng.

   After graduation, the students embarked on a challenging new chapter in their lives.

   Source: Dong Chinese Dictionary

2. 科考队已经准备就绪，即将踏上前往北极的科学征程。

   kē​kǎo​duì yǐ​jīng zhǔn​bèi jiù​xù, jí​jiāng tà​shàng qián​wǎng běi​jí de kē​xué zhēng​chéng.

   The scientific expedition team is ready and about to embark on a scientific journey to the North Pole.

   Source: Dong Chinese Dictionary