Birational
双有理的
🗣️ 情景例句
What kind of things are you interested in?
你对什么样的事情感兴趣？
Deeds, no words.
不要光说不练。
becomes so worn and unreliable that it eventually is not worth mending.
磨损太厉害，老得一点儿也不准了，最终会不值得修理了。