Upgrading
v. 升级；提高品位（upgrade的现在分词）
✅ 同义词
🔴 反义词
🗣️ 情景例句
Yes, but the number's no longer in service.
打过，但那个号码是空号。
That's monkey business!
胡闹！
She's sitting under the tree.
她正在树荫下坐着。