Nondifferentiable
不可微分的
🗣️ 情景例句
I can always depend on you, Sam.
我知道我可以依靠你 ，Sam。
Give me a look.
借看一下。
Frank gently lifted the crockery out of the box an suddenly noticed a miniature painting at the bottom of the packing case.
弗兰克轻轻地把陶器拿出箱子，突然发现在箱底有一幅微型画，