3 sentences

1. 这是一个全国性的问题。

   zhè shì yī gè quán​guó​xìng de wèn​tí.

   This is a nationwide problem.

   Source: Dong Chinese Dictionary

2. 政府正在开展一场全国性的禁毒运动。

   zhèng​fǔ zhèng​zài kāi​zhǎn yī cháng quán​guó​xìng de jìn​dú yùn​dòng.

   The government is launching a nationwide anti-drug campaign.

   Source: Dong Chinese Dictionary

3. 这里的几个协会组成了一个全国性的联合会。

   zhè​lǐ de jǐ gè xié​huì zǔ​chéng le yī gè quán​guó​xìng de lián​hé​huì.

   Several associations here have formed a national federation.

   Source: Dong Chinese Dictionary