Professor, Captain Nemo replied, static objects mustn't be confused with dynamic ones, or we'll be open to serious error.

教授，尼摩船长回答，不应当把静力学和动力学混：淆起来，不然的话，就要发生严重的错误。

It only works on static objects, like rocks, curbs, trash cans.

Valerio：它只适用于静态物体，如岩石、路缘石、垃圾桶。