Upgradeability
n. 可升级性；升级功能
🗣️ 情景例句
If you have any trouble, let me know.
如果你有任何的麻烦，请告诉我。
What time does the first train to Boston leave?
第一班去波士顿的列车什么时间开出呢？
Can we expect the same price as last time?
价钱能够和上次的一样吗？