Do not perform a switch over if any of the prerequisites are not met.
如果有任何前提条件不满足，就不要执行切换。
Some computers can perform over a billion computation a second.
有些计算机一秒钟能完成超过十亿次运算。
However, in real time these over-optimized systems rarely perform well.
然而，在现实中，这些过分优化的系统很少表现良好。
The drummers and dancers will perform throughout the state over the next two weeks.
鼓手和舞蹈员将会在未来两周在横跨整个州表演。
We are really competing against ourselves. We have no control over how other people perform.
我们最大的对手是自己，我们无法控制别人如何表现。
Over time, studies show, about 80% actually under-perform the index.
研究发现，长时间来看，大约80%的共同基金表现弱于大盘。
Over time, studies show, about 80% actually under-perform the index.
研究发现，长时间来看，大约80%的共同基金表现弱于大盘。
应用推荐