... 实际丈量：physical measurement 实际造价：actual building cost 实际小方块强度：works cube strength ...
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actual l building cost 实际造价
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Add to that the actual cost of delivering music online, which is mostly the cost of building and maintaining the online service rather than the negligible storage and bandwidth costs.
下载音乐的服务所需要的开发和维护费用约为每首曲目17美分，而存储和带宽的费用几乎可以忽略不计。
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