Dural sac
[医] 硬脊膜囊
🧩 词语组成解析
a. 硬脑膜的\\n[医] 硬脑[脊]膜的
sac
[sæk]
n. （动植物组织中的）囊，液囊;
abbr. 缩写 = (US) Strategic Air Command 战略空军司令部。;
🗣️ 情景例句
ready for the graduation ceremony,
为毕业典礼做准备，
I have a lot of trouble with pronunciation.
我有发音的很多毛病。
The doctor says that he will come at once.
医生说他马上就来。安迪，