essential to

In these areas, trade and credit were essential to economic life.

在这些方面, 贸易和信贷成了经济生活中不可缺少的东西.

It is essential to feel at ease with your therapist.

在治疗师面前放松下来是很重要的。

In criticism, it is essential to guard against subjectivism and arbitrariness.

批评要防止主观武断.

In scientific discussions it is essential to guard against subjectivism and arbitrariness.

在科学讨论中要严防主观武断.

Can it be moral to make so much money out of a commodity which is essential to life?

靠着一种生活必需品赚这么多钱，这在道德上说得过去吗？

In analysing a situation, it's essential to distinguish the main aspect from the minor ones.

分析形势, 要看清主流和支流.

Catching to fashion is not essential to the happiness of all women.

赶时髦对所有妇女的幸福并非都是必要的.

Impartiality is essential to a judge.

公平是当法官所必需的.

It was absolutely essential to separate crops from the areas that animals used as pasture.

将庄稼和放牧区分开绝对必要。

It is therefore essential to know the age distribution in the population.

所以,了解在该种群中的年龄组配状况是很重要的.

The core of regular contributors is essential to the magazine.

有一群经常投稿的人对这份杂志是极为重要的.

It's essential to know which is which as treatments will be quite different.

由于治疗的方法将会全然不同，因此弄清楚哪个是哪个很重要。

Physical models are essential to understanding how a device will be manipulated.

对于了解一种设备如何被持握和携带,物理模型是非常有必要的.

It will be essential to establish how the money is being spent.

查清楚这笔钱将作何用途至关重要。

For pictures of people behaving naturally, not posing for the camera, it is essential to shoot unnoticed.

要拍出不专门摆姿势、举止自然的人物照片，抓拍是关键。