It is necessary that we devise a new system to improve our productivity.

我们有必要设计一个新制度以提升我们的生产力。

It is the light of course but it is necessary that the place be clean and pleasant.

“亮固然要很亮，但也必须是个干净愉快的地方。”

Considering the current grim situation, it is necessary that the authorities concerned should take immediate measures to eliminate these disadvantages.

鉴于目前形势严峻，有关部门有必要立刻采取措施来消除这些弊端。

It is necessary that I should ruin and humiliate myself.

我必须毁灭和羞辱自己。

It is not enough to simply memorize our laws, it is necessary that we comprehend why and how they were formed.

仅仅记住法律条款是不够的。我们必须理解它是为什么且如何形成的。

So for the neighbors and for many people, it is necessary that the situation in Venezuela will be resolved very soon.

对委内瑞拉邻国和多数人来说，尽快解决委内瑞拉局势势在必行。

It is necessary that my messenger should be educated, should be intelligent, should be silent as the grave.

我的使者有必要受过教育， 应该聪明，应该像坟墓一样沉默。

It is necessary that I attend to my moustaches — they are deplorably limp from the heat of travelling.

我有必要注意我的胡须——由于旅行的高温， 它们软得可怜。

In order to give this security, however, it is necessary that the insurers should have a very large capital.

然而，为了提供这种保障，保险公司必须拥有非常大的资本。

It is necessary that other nations learn from China's success in curbing its population surge over the past three decades.

其他国家有必要向中国学习过去三十年在遏制人口激增方面取得的成功。

To defend them from the barbarous natives, it is necessary that the place where they are deposited should be in some measure fortified.

为了保护他们不受野蛮土著的侵害，存放他们的地方有必要在某种程度上加固。

In order to understand the phrase " this morning" it is necessary that we should have a way of feeling time-intervals, and that this feeling should give what is constant in the meaning of the words " this morning" .

为了理解“今天早上”这个短语，我们必须有一种感觉时间间隔的方式，并且这种感觉应该给出“今天早上”这个词的含义中不变的东西。

If you say you have to buy some new shoes, you mean the same as if you had said, " I need to buy some new shoes." Both of these mean that it is necessary that you do this thing.

如果你说你必须买一些新鞋，你的意思就好像你说“我需要买一些新鞋”一样。这两个都意味着你有必要做这件事。