To do so, however, we had to cross a marshland and many of us were afraid we might get bogged down in the mud.

• 我们营长决定冒一下险。我们在夜幕掩盖下出发，不顾困难，奋勇向前。幸运的是，夜间温度突然下降到摄氏零下20度，烂泥地都结上了冰。