But in some of the occasions with low requirements are often used stepping motor to do execution motor.

但在一些要求不高的场合也经常用步进电机来做执行电动机。

Validate data: statement hooks let you validate parameter data before statement execution, providing the opportunity to do constraint check and data validation at the application level.

验证数据：通过语句钩子可以在执行语句之前验证参数数据，从而为应用程序级的约束检查和数据验证提供机会。

You've seen various types of tests and even how to measure the coverage of those tests — but how do you ensure that the execution of these tests happens at regular intervals?

已经介绍了多种类型的测试，甚至介绍了如何测量这些测试的覆盖率——但是如何确保以正常的间隔执行这些测试呢？

This problem also highlights one of the fundamental design principles when it comes to working with parallel data structures: Do not assume sequential execution of any code, ever.

这个问题也突显了并发数据结构的基本设计原则之一：决不要假设任何代码会连续执行。

In a real application, however, you'll probably want to do some initialization before running the script and some finalization after the script's execution.

不过，在实际的应用程序中，可能需要在运行脚本之前进行初始化并在脚本执行完后进行最后的清理工作。