Writing English skills as a prefer, but not prerequisite.

最好有英语写作技能，但不是必须的。

youdao

The third article in this series, on customization options for staff resolution, is not prerequisite for this article, but provides the motivation for the technical details described here.

本系列中关于人员解析自定义选项的第三篇文章不是本文的先决条件，但是为这里描述的技术详细信息提供了动机。

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In rejecting utility as a measure of value, they arrived at a labor cost theory of value, wherein utility was regarded as a condition or prerequisite of value but not as a measure of it.

在拒绝将效用作为价值量度的同时，他们形成了价值的劳动成本理论。在该理论中，效用被认为是价值的基础或先决条件，但不是价值的量度。

youdao

Sometime later, I will deal with functions of more than one variable, which I will briefly introduce to you, because that may not be a prerequisite but certainly something you will learn and you may use on and off.

再过段时间,我要开始处理多变量函数,到时候我会向你们进行简单介绍,因为那不是必须的,但是你们以后会学到,有时候还能派上用场

耶鲁公开课 - 基础物理课程节选

But, given the swarm of vain consumers out there, hard proof may not be prerequisite for success.

FORBES: Magazine Article

But given the swarm of vain consumers out there, hard proof may not be a prerequisite for success.

FORBES: Technology

But they do not really bear out the assertion that the rule of law is an underlying prerequisite for growth.

ECONOMIST: Economics and the rule of law