The rooms were acrawl with the small cleaning animals, all rubber and metal.

橡胶做的，金属做的小小的清洁房间里碌着。

Even at this hour it was acrawl with men, builders pushing up a new switchback stair to join the remnants of the old.

即上面挤满了人，工匠正将新的梯子接到旧的上。