必须的

This process is necessary to reduce overproduction.

要消灭过度生产这一步骤是必须的。

It is essential to have some peace and quiet every day.

每天有一些和平和安静是必须的。

An integrin, or integrin receptor, is an integral membrane protein in the plasma membrane of cells.

粘合素，或粘合素受体是细胞膜中一种必须的膜蛋白质。

To play safe in the stock market is necessary.

句子原意：在股市上做得安全是必须的。

Additional tools which will be required are metre stick, plumb line and compass.

其他必须的工具包括米尺，铅垂和罗盘。

For example, a light fixture over the pool table is a must.

例如，在台球桌上面放一个灯是必须的。

Potassium is necessary to the existence of all living things.

钾是所有生物生存必须的。

Potassium is essential for life and is present in all soils.

钾是生命活动必须的，存在于各种土壤中。

But it is still necessary to keep practising.

但是保持练习仍然是必须的。

It is a pre-requisite for product placement onto the Russian market but is not required for customs clearance.

它是产品进入俄罗斯市场所必须的，但是在清关不需要。

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。