Upgradable
a. 能提到更高一级标准的(=upgradeable)
🗣️ 情景例句
Robbie, maybe you should call them，
Robbie也许你应该给他们打个电话，
Do you live up the street?
你在街头居住吗？
The teacher gives one of them an eraser.
教师给其中一人一块橡皮擦。