translation.en: You understand that you can prepare, but the amount of preparation you can do is limited -- you can take some water, you can have a map, you can have a pack.
translation.zh: 你知道你是可以做提前准备的， 但你所能做的准备 却是有限的。 你可以带上水，一个地图， 你可以有一个背包。