Massive machinery deployed in the form of dozers, carving wide lines in the earth.

大型机械推土机在地上挖出宽阔的线条。

The soldiers were in front of us, extending into a pretty wide line with an interval between man and man.

士兵们站在我们面前，延伸成一条相当宽的线，人与人之间的间隔。

And without ethical guidelines in place, it was a very wide open line of questioning about whether what they were doing was helpful or harmful.

在没有适当的道德准则的情况下，关于他们所做的事情是有益还是有害的问题是一个非常开放的问题。