Pcd
abbr. 节圆直径（Pitch Circle Diameter）；巴拿马运河局（Panama Canal Department）
🗣️ 情景例句
That's it.
就这样。
Which one do you want to buy?
你买哪一个？
many of them serious and senior scientists---- who dream of sending people to it.
其中的不少人是认真和资深的科学家，他们一直梦想着把人送上火星。