Of the many thousands of languages that have been implemented just a few have survived through a process of natural selection because they are particularly fit for purpose.
Summary information about service performance can be fed back into WSRR and used by the execution environment to affect the selection of the best-fit provider.
关于服务性能的摘要信息可以放回到WSRR中，执行环境使用这些信息影响最佳供应商的选择。
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The downside of relying on self-selection is that, in the current job market, applicants may try for jobs that they know won't fit them, convincing themselves that they can change.