We're operating in a dog-eat-dog world.

我们是在一个残酷竞争的世界里立足。

It's a dog-eat-dog world.

这真是一个竞争激烈的世界。

Some people say we live in a dog-eat-dog world.

有些人认为，我们生活在一个“竞争激烈的”世界。

Some people say we live in a dog-eat-dog world.

有人说，我们生活在一个竞争激烈的世界里。

Some people say we live in a dog-eat-dog world.

有人说，我们生活在一个竞争激烈的世界。