The Backroom is at your back․ The Frontroom is at your front․ We can never reach the Backtoom․ For when we get there‚ It turns into the Frontroom․ That's no longer the Backroom․ 后室在你身后。前室在你面前。我们不可能进入后室。因为当我们到达之时，它就成为了前室。那它就不是后室了