Upgradability
n. 可升级性；升格能力；提升能力
🗣️ 情景例句
that will bring parents and teachers together once a week
让家长们及教师每星期一次
Not getting the job was a terrible disap-pointment.
得不到那份工作，叫人失望极了。
Shut the door, please.
请把门关上。