essence: 意思是“最基础最重要的部分”，我们常说“精髓，核心，本质”，同义nature, soul等。
例句:
1.The essence of Macau is poker chips and entertainmemt.(poker chips 指赌场游戏桌上的筹码)
2. The essence of various cryptocurrencies is blockchain technology.
3. The essence of writing is clear thinking.(当我们在讨论某事时究竟在讨论什么)
作业:
1. 翻译:
The essence of start-ups is rapid growth.
2. 场景: 合作的本质是共赢。
The essence of business cooperation is mutual benefit.
