我们家中的氡是接触致电离辐射的主要来源，在许多国家中占大众接触自然发生的辐射源的50%。

Radon in our homes is the main source of exposure to ionizing radiation, and accounts for 50% of the public's exposure to naturally-occurring sources of radiation in many countries.

youdao

他想象他们突破障碍领他逃出生天，他仿佛看见自己拥抱妻儿，回到家中，致电友人，吃喝跳舞，欢庆脱险。

He imagined them breaking through and walking him out, and he saw himself embracing his wife and child, going home, calling up friends, and eating and dancing to celebrate his rescue.

youdao