2 sentences for 强国 (qiáng​guó)

1. 中国正努力建设成为现代化强国。

   Zhōng​guó zhèng nǔ​lì jiàn​shè chéng​wéi xiàn​dài​huà qiáng​guó.

   China is striving to build itself into a modern, powerful nation.

   Source: Dong Chinese Dictionary

2. 战国七雄是指战国时期的七个强国。

   Zhàn​guó qī xióng shì zhǐ Zhàn​guó shí​qī de qī gè qiáng​guó.

   The 'Seven Hegemons' refers to the seven powerful states of the Warring States period.

   Source: Dong Chinese Dictionary