Upgradability
n. 可升级性；升格能力；提升能力
🗣️ 情景例句
I have spent my whole life slaving away, it's time for me to take a break and see some of this great country.
我的一生都在忙碌中度过的，现在是休息的时候了，也是去游历这个伟大国家的时候了。
Continual failure drove him to suicide.
不断的失败逼得他自杀。
What's that in your hand?
你手里拿的是什么？