Packstone
泥粒灰岩
🗣️ 情景例句
Not at all.
绝不是
You have your choice of three flavors of ice cream.
你有3种风味的冰淇淋可选择。
One is the general atmosphere of secrecy in which it is carried out,
一是科研工作中普遍存在的保密气氛；