快照实际上就是基准的集合，工作区中的每个组件有一个基准。
A snapshot is really just a collection of baselines, one for each component in your workspace.
这个基准测试框架首先将所有文档读入内存缓冲区，然后对针对文档的输入和输出操作的多次传递进行计时。
This benchmark framework first reads all documents into internal memory buffers, then times multiple passes of input and output operations on the documents.
希腊国债支付的利息相对于基准德国债券利息的溢价达到逾4个百分点，创下希腊加入欧元区以来的最高水平。
The interest rate premium Athens pays over benchmark German bonds rose to more than 4 percentage points, its highest level since Greece joined the eurozone.
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