Rickett's organism
[医] 立克次氏体
🧩 词语组成解析
🗣️ 情景例句
No doubt about it.
毫无疑问。
He tells me is a city boy, and this is his first time to live in a camp like this.
他说他是一个都市男孩，这是他第一次过这种野营生活。
Why not?
为什么不去？