英语语法分析

K. Consider the following for swamps, lakes, and unfordable rivers.

在沼泽，湖泊和无法绕行的河流中行进，考虑以下几点。

The explorers were confronted with gorges(that were)almost impassable and rivers(that were)often unfordable.

探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流。