2 sentences

1. 战士们在阵地前筑起了一道坚固的壁垒。

   zhàn​shì men zài zhèn​dì qián zhù qǐ le yī dào jiān​gù de bì​lěi.

   The soldiers built a solid barrier in front of the position.

   Source: Dong Chinese Dictionary

2. 为了促进自由贸易，各国应努力消除关税壁垒。

   wèi​le cù​jìn zì​yóu mào​yì, gè guó yīng nǔ​lì xiāo​chú guān​shuì bì​lěi.

   To promote free trade, countries should strive to eliminate tariff barriers.

   Source: Dong Chinese Dictionary