Backward equation
[计] 后向方程
🧩 词语组成解析
🗣️ 情景例句
We love you, Grandpa.
我们爱你，爷爷。
He's been behind bars for almost 30 years.
他坐了将近30年牢。
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。