Follow the practice of explicitly stating when a specific sequence within such a group of steps is mandatory.

当在这样一组步骤的特定顺序被托管时，请习惯于跟随明确的状态。

youdao

This mapping is the common practice, but it is not mandatory, though.

这种映射是常见的使用方式，但不是必要的。

youdao

College education modes of face to face, precise instructions, mandatory mode, as well as about the limitation of style, these are in the field of artistic practice be eliminated.

学院教育当中面对面的、精准的指示，强制性的模式，以及关于风格的限制，这些都在艺术实践的领域被消解。

youdao

But there are many arguments over whether the practice is mandatory or just recommended.

ECONOMIST: Hair, beards and power

Of these three, only Enrolled Agents have been subject to the direct oversight of the IRS Office of Professional Responsibility as to their return preparation practice, testing and mandatory Continuing Professional Education (CPE).

FORBES: Who's preparing your tax return?