2 sentences

1. 挫折是成长的必经阶段。

   cuò​zhé shì chéng​zhǎng de bì​jīng jiē​duàn.

   Setbacks are an inevitable stage of growth.

   Source: Dong Chinese Dictionary

2. 这是通往市中心的必经之路。

   zhè shì tōng​wǎng shì​zhōng​xīn de bì​jīng zhī lù.

   This is the only way to the city center.

   Source: Dong Chinese Dictionary