Mesocosm
中型实验生态系
🗣️ 情景例句
Hello. This is an emergency. Can you please send an ambulance?
喂，这儿有急病患者，请派一部救护车来。
What is the number?
号码是多少？
I used to travel by air a great deal when I was a boy.
我在幼年的时候，曾多次乘飞机旅行。