Upgrading
v. 升级；提高品位（upgrade的现在分词）
✅ 同义词
🔴 反义词
🗣️ 情景例句
I didn't even finish it.
没有能吃完它。
Did you use to go fishing with friends?
过去你常和朋友钓鱼吗？
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。