Cavum medullare
[医] 髓腔
🧩 词语组成解析
n. 空腔(如耳腔)
🗣️ 情景例句
Hello. Mr. Carlson, please.
哈喽 ，请找一下Carlson先生。
I wonder what happened to him.
我不知道他出什么事了。
and the more difficult it is, the more highly it is regarded.
他们认为， 道路愈艰险愈带劲儿。