The steep ruggedness of the volcanic terrain made this work very difficult; it required picks, sledgehammers, and a lot of sweat.

由于火山地形险峻陡峭，他们的活干得很艰难，十字镐和重锤都要派上用场，而且汗流浃背。

youdao

The steep ruggedness of the volcanic terrain made this work very difficult; it required picks, sledgehammers, and a lot of sweat.

由于火山地形险峻陡峭，他们的活干得很艰难，十字镐和重锤都要派上用场，而且汗流浃背。

youdao