The rate of rail creep lengthening is not the same at the different time after the new rail laying on the track.

得出新钢轨上道后的不同时期，其蠕变伸长速率是不同的。

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The rate of rail creep lengthening at the beginning after rail laying on the track is greater than that of the afterward time.

新钢轨上道后的前期，蠕变伸长速率较大，以后逐步降低。

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During rail laying, the loop part of the U-shaped bent loop is knocked bent to hold down the foot of the rail and in this way, the sleeper and the rail are connected together.

铺轨时，“U”形弯环的环部被砸弯，压住钢轨的底脚，即可将轨枕与钢轨联结在一起。

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Network Rail said workers were laying a pipe underneath the track to allow the water to drain away onto the other side.

BBC: Bridgend flooding: Brackla flats evacuated

Or they ought to talk to the crews that are rebuilding all the highways and laying tracks for new rail lines -- including road projects that are putting hundreds of people to work in this area.

WHITEHOUSE: Creating a Green Impact Zone

From there, workers are laying a steep highway and light rail for 30 miles up a valley though mountain tunnels to the ski venues.

WSJ: Social Media