Mitralization
二尖瓣型心
🗣️ 情景例句
Absolutely.
绝对。
In Britain, there are open universities.
在英国，有成人大学。
I Know. That's a good idea! said Ann. But in England we still make tea in teapots.
“明白了。是个好主意！”安说，“但是在英国我们仍用茶壶泡茶。”