2 sentences

1. 你是我们最后的屏障。

   nǐ shì wǒ​men zuì​hòu de píng​zhàng.

   You are our last line of defense.

   Source: OpenSubtitles

2. 我们的肌肤表面覆盖着一层保护屏障。

   wǒ​men de jī​fū biǎo​miàn fù​gài zhe yī​céng bǎo​hù píng​zhàng.

   The surface of our skin is covered with a protective barrier.

   Source: CCMatrix