yin fire

例句：

1. 1. The ancient Chinese believed that yin fire was a force of nature that could be harnessed for beneficial purposes.
   古代中国认为阴火是一种自然力量，可以用于有益的目的。
2. 2. In traditional Chinese medicine, yin fire is considered to be the underlying principle of all physical and mental health.
   在传统中医中，阴火被认为是所有身体和心理健康的基本原理。
3. 3. During the winter months, people often use yin fire to warm their homes and bodies.
   在冬季，人们常常使用阴火来温暖他们的家和身体。