After months of tinkering, the work conditions were returned to the original state, and workers built more relays than they did in the exact same circumstances at the start of the experiment.

在历时几个月的改进之后，一切试验元素恢复原样，而工人们的劳动生产率却没有跟着下降。

youdao

"Eight people at a time work in relays to carry the stretcher down the mountain with pathfinders checking the route, " said Mr Jones.

BBC: Wales snow: Rescuers' mountain walk equipment warning