Ectoethmoid
外筛骨
🗣️ 情景例句
What's wrong?
什么病
He is working on a book about the Vietnam War.
他正在写一本关于越战的书。
Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.
人们很少能看到活着的这类动物，因为它们生活在600英尺深的水下。