1 sentence

1. 不安全的氡水平会积聚在任何建筑物，包括家中。

   bù ān​quán de dōng shuǐ​píng huì jī​jù zài rèn​hé jiàn​zhù​wù, bāo​kuò jiā​zhōng.

   Unsafe levels of radon can accumulate in any building, including homes.

   Source: CCMatrix