Tetrapolis
n. 四城镇(组成的)地区,四城镇(组成的)城邦, 四城镇行政区
🗣️ 情景例句
That's relief.
真令人欣慰。
If two men ride on a horse, one must ride behind.
两人同骑一马，必有一人在后。
Let us suppose that you are preparing a meal and keeping an eye on the baby at the same time.
假设你在做饭，同时又在照看孩子。