Circulating system
[机] 循环系统
🧩 词语组成解析
a. 循环的, 流通的\\n[经] 流动
🗣️ 情景例句
What's it for?
是做什么用的？
He is rich enough who has true friends.
有真朋友的人是富翁。
Why isn't Mrs. Lee's cat catching the mice?
李太太的猫为何不在抓这些老鼠呢？