Upgradable
a. 能提到更高一级标准的(=upgradeable)
🗣️ 情景例句
Today has just been crazy.
今天都快忙疯了。
What's goes on here?
什么事？
All at once, a rabbit came out of a hole.
突然，一只兔子从一个洞中跑了出来。