有一个教练，并且固定的练习时间是我们保持健康的最好的方式。
Having a coach and regular time of practice is the best way for us to remain fit.
在本示例练习中，可以看到负载定义如何显著影响支持固定用户数所需的硬件资源量。
In this example exercise, you can see how the workload definition dramatically affects the amount of hardware resources required to support a fixed user population.
这个练习需要更多技巧，因为要按照分组和周期将数据排列成常见的格式，所以需要某些具有想像力的代码，不能简单地将各部分放在固定的位置。
What about the entire periodic table? That exercise is trickier because you have to arrange the data into the familiar format based on group and period, which requires some fancy coding.
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