Upgradation
升级；改善；提高
🗣️ 情景例句
How shall I address you?
我该怎样称呼你？
My biggest problem so far has been trying to remember everybody's name.
迄今为止我最大的问题就是尽量记住每个人的名字
Let us do it by ourselves，will you?
我们自己做这件事，可以吗？