由于成本和时间的原因，我们决定将复制品缩小一半，并使用合成材料来缝合。
It was decided to make the replica half-scale for reasons of cost and time, and synthetic materials were used for the stitching.
由于在有些安装的操作策略和复制成本，专用的服务器环境并不总是可能的。
Because of operating policies and replication costs at some installations, a dedicated server environment is not always possible.
不过，这种紧密的复制有很高的性能成本，并且难于实现，当群集接近某一规模时，还会有伸缩性的问题。
However, such tight replication has a considerable performance cost and implementation complexity, and may also have scalability problems as the cluster approaches a certain size.
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