In West Africa, people have long chewed kola nuts as stimulants, because they contain caffeine that also occurs naturally in tea, coffee, and chocolate.
2017年12月六级真题(第一套)阅读 Section C
柯林斯高阶英汉双解学习词典释义
VERB
咀嚼;嚼(碎)
When you chew food, you use your teeth to break it up in your mouth so that it becomes easier to swallow.