fuel和energy的区别
fuel是燃料的意思，而energy则是能源的意思，区别可以从以下例子看出：
Fuel is one kind of energy, as more population growth, scietician have to discover more energy to meet the requirements, such as windy energy and solar energy. 燃料是一种能源，随着越来越多的人口增长，科学家必须发现更多的能源来满足需求，比如风能和太阳能