Upgradable
a. 能提到更高一级标准的(=upgradeable)
🗣️ 情景例句
I want to thank you in advance.
在此先致谢，请多多关照。
Please be serious for a minute, this is very important.
请严肃点，这件事很重要。
'But I'm still having breakfast,' I said.
“但我还在吃早饭，”我说。