Upgrading
v. 升级；提高品位（upgrade的现在分词）
✅ 同义词
🔴 反义词
🗣️ 情景例句
There are lots of places to go,
有很多地方要去，
To worry about tomorrow is to be unhappy today.
担心明天，今天就不愉快了。
What's it about?
它是讲什么的？