他被派去扳道岔.He was assigned to man the switches.道岔无缝化是跨区间无缝线路发展的难点和关键技术.Jointless turnout is a key technique in developing CWR track across section.铁路道岔与中铁山桥平分中国市场.Railway yard with iron sanshan bridge in the Chinese market....
A profusion of leaves bursts out on trees in the springtime.春天许许多多的叶子从树上冒出来.It was springtime and the slopes were ablaze with almond blossoms.时当春季,怒放的扁桃花使那片山坡鲜红似火.The blossom on the trees looks lovely in springtime.春天树上的...