这个行业竞争激烈，完全是适者生存的残酷环境。

In this industry, it's a ___kill-or-be-killed game where only the strongest survive.

在这片荒原上，幸存者们被迫遵循着不是你死就是我活的残酷法则。

In this wasteland, survivors have to follow the brutal ___kill-or-be-killed rule.