We do not have enough oxygen reserves to get us to our payload delivery point, let alone to survive the return journey.

- 我们没有足够的氧气储备来让我们到达有效载荷交付点，更不用说在返程中生存了。

It could also be in the logistic chain we're delivering packages, let's say the last mile to your home or the last mile to delivery point you called.

它也可能在我们正在运输包裹的物流链中，比如到你家最后一英里地方或到交货点最后一英里的地方 。