2 sentences for 重重 (chóng​chóng — layer upon layer)

1. 尽管有重重困难，他们最终还是幸存下来。

   jǐn​guǎn yǒu chóng​chóng kùn​nan, tā​men zuì​zhōng hái​shi xìng​cún xià lai.

   Despite great difficulties they managed to survive.

   Source: CCMatrix

2. 一个项目之所以风险重重，因为它把你带入未知的水域。

   yī​ge xiàng​mù zhī​suǒ​yǐ fēng​xiǎn chóng​chóng, yīn​wèi tā bǎ nǐ dài​rù wèi​zhī de shuǐ​yù.

   The reason that a project is full of risk is that it leads you into uncharted waters.

   Source: CCMatrix