Kerr's sign
[医] 克尔克氏征(脊髓损害平面下的皮肤变厚)
🧩 词语组成解析
🗣️ 情景例句
I'm sorry to say this, but there seems to be a mistake.
对不起，这儿好像有个错。
He already has a phonograph,but he doesn't have a radio yet.
他已经有一架留声机，但是他还没有收音机。
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41岁，但他却过世界上几乎每一个国家。