必须的

I'm not really sure if it was necessary though.

我不太知道这是必须的。

This step is not necessary, but there is no harm in doing so.

这一步不是必须的，但这么做没有害处。

"In some ways it is," I replied.

"在某些方面是必须的。"

This article is a MUST, if you are so inclined!

本文是必须的，如果你是如此倾斜！

Initial data : Initial data are needed for the application to work.

初始化数据：是应用程序正常运行所必须的数据。

That is integrant luxury.

这是必须的奢侈品。

Before cutting food, some Americans switch their knife and fork to the opposite hands, but it isn't necessary to do this.

在切食物之前，有些美国人会把刀叉换个手，但此举并不是必须的。

Before cutting food,so me Americans switch their knife and fork to the opposite hands,but it isn' t necessary to do this.

在切食物之前，有些美国人会把刀叉换个手，但此举并不是必须的。

We knew that we had the makings of a great team.

我们拥有一个伟大团队所必须的所有素质。

That is not mandatory .

这不是必须的。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。