He never makes a false step, never shies.

他从不犯错， 从不畏缩。

I would die to keep you from making a false step and ruining your life.

我愿以死不让你误入歧途毁了你的一生。

Axel made a false step, lost his footing, and came down in a cleft of rock, astride of a boulder, pinned down by the weight of a tree.

阿克塞尔踩错了一步，失去了立足点，掉进了一块岩石裂缝中，跨在一块巨石上，被一棵树的重量压住了。