I found myself on a sidewalk leading past the backs of several somber-colored warehouses, each with large bay doors for unloading trucks, padlocked for the night.

我发现自己站在一条人行道上，它通向几座暗色调的大仓库背后，每一座仓库都有着巨大的供货车卸货用到车库门，因为到了晚上而紧锁着。

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Thirdly, we study the problem that quay cranes perform loading and unloading operations simultaneously in the same ship-bay, namely quay crane dual cycling scheduling problem.

然后，研究装卸桥在同一贝位内同时进行装船与卸船作业的调度问题，即同贝同步装卸调度问题。

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