However, profiling is still a useful, and often vital, part of the optimization process.
然而，profiling仍然非常有用，通常它都是优化过程的一个关键步骤。
This global optimization process is time-consuming.
这个全球优化过程耗时。
Then the optimization process was launched as step 3;
第三步是启动优化过程；
Second, the optimization process and teaching methods.
第二，优化过程与教学方法。
Second, the optimization process and teaching methods.
第二，优化过程与教学方法。
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