士兵们发现很难在天黑前走完50公里的翻译：The soldiers found it difficult to walk before dark 50 km 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The soldiers found it difficult to finish the 50 km in the dark before

The soldiers found it difficult to walk before dark 50 km

The soldiers discovered walks very difficultly in front of darkness 50 kilometers

It is difficult for the soldiers found before dark completed 50 km

The soldiers found it difficult to walk before dark 50 km