Sinnses pericranii
[醫] 顱骨膜血竇, 顱骨膜血腫
??? 情景例句
I know so.
我確定知道是這樣。
If he doesn't, will you eat some?
如果他不，你會吃一些嗎？
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他們知道了鉆透那堅硬的巖石有多么困難，他們會喪失信心的。