Warthin's sign
[医] 瓦尔信氏征(急性心包炎的一种听诊体征)
🧩 词语组成解析
🗣️ 情景例句
and sometimes there isn't.
有时候没有。
Why aren't you happy?
为什么无聊呢？
It is almost always due to some very special circumstances that traces of land animals survive,
几乎总是由于某些特殊的条件，陆地动物的遗体才被存下来，