They were expecting to see one certain frequency or one line in the spectrum at this point here.

他们预计会看到某个特定的频率，或者在这里的光谱中的一条线。

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It takes many registers to keep one line moving quickly, and some stores can't afford the space or manpower.

要保持一条队伍的快速运转，需要很多的收银机，而且有些商店负担不起空间和人力。

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Put one line for each server.

为每个服务器添加一行。

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