Upgradability
n. 可升级性；升格能力；提升能力
🗣️ 情景例句
Don't mention it. What would you like to drink?
别客气，想喝点什么？
This round table is good.
这张圆桌很不错。
He may never be sure where the next meal is coming from, but his is free from the thousands of anxieties which afflict other people.
他可能从不知道下顿饭有无着落，但他不像有人那样被千万桩愁事所折磨。