Underling all this growth will be the demand for energy, which is expected to double over the next 40 years.
出自-2011年12月阅读原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
跟班儿；手下；羽翼；喽啰；走卒
You refer to someone as an underling when they are inferior in rank or status to someone else and take orders from them. You use this word to show that you do not respect someone.