Canaliculi mastoideus
[医] 乳突[部]小管
🧩 词语组成解析
[医]（单canaliculus）小管
🗣️ 情景例句
The checkout counters are very busy.
收款台都很忙。
What are those?
那些是什么？
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。