White fat cells have many functions one of the most important being that they're the body's primary energy source.

白色脂肪细胞有很多功能，其中最重要的是它们是身体的主要能量来源。

Coal took over wood as the primary energy  source in the First Industrial Revolution.

在第一次工业革命中，煤炭取代木材成为主要能源。

Sugars, like glucose and fructose, are used throughout multiple mechanisms of our evolutionary energy system, making it our body's primary energy source.

糖，如葡萄糖和果糖，在我们进化能量系统的多种机制中被使用，使其成为我们身体的主要能量来源。