5 sentences

1. 中国男篮正在备战奥运会。

   Zhōng​guó nán​lán zhèng​zài bèi​zhàn ào​yùn​huì.

   The Chinese men's basketball team is preparing for the Olympics.

   Source: Dong Chinese Dictionary

2. 军队正处于紧急备战状态。

   jūn​duì zhèng chǔ​yú jǐn​jí bèi​zhàn zhuàng​tài.

   The army is in a state of urgent combat readiness.

   Source: Dong Chinese Dictionary

3. 很多顶尖运动员都在积极备战下一届奥运会。

   hěn​duō dǐng​jiān yùn​dòng​yuán dōu zài jī​jí bèi​zhàn xià yī jiè ào​yùn​huì.

   Many top athletes are actively preparing for the next Olympic Games.

   Source: Dong Chinese Dictionary

4. 中国男足正在主场积极备战。

   Zhōng​guó nán​zú zhèng​zài zhǔ​chǎng jī​jí bèi​zhàn.

   The Chinese men's national football team is actively preparing for the match at home.

   Source: Dong Chinese Dictionary

5. 为了应对潜在的威胁，军队开始了紧急备战。

   wèi​le yìng​duì qián​zài de wēi​xié, jūn​duì kāi​shǐ le jǐn​jí bèi​zhàn.

   In response to potential threats, the military has begun emergency combat preparations.

   Source: Dong Chinese Dictionary