This principle is called " herd immunity" .

则被称为“群体免疫”。

For the first time, environmental principles will be enshrined in law.

环境保护则将首次写入法案。

I am conservative and I stick to my principles and keep to rules.

我是保守的人；我坚持则，遵规守矩。

His speech began this way: “Four score and seven years ago, our fathers brought forth on this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal.”

“八十七年前，我们先辈在个大陆上创立了个新国家，它孕育于自由之中，奉行切人来平等的则。”

The principle of British welfare is no longer that you can insure yourself against the risk of unemployment and receive unconditional payments if the disaster happens.

如果不幸的情况发，英国的福利则不再是确保你自己避开失业的风险和无条件的接受失业保险。

The Israeli leader Menachem Begin called him unprincipled, avaricious, heartless and lacking in human feeling after he said that Germans living in a divided nation should feel sympathy for Palestinian self-determination.

在他发表了在个分裂国家中的德国人应当对巴勒斯坦人的民族自决表示同情的言论后，以色列领导人贝京称他没有则立场、贪得无厌、没心没肺，而且缺乏人类感情。

It's my principles. We're talking about my principles.

是则问题 重点是我的则。

To combat the trap of putting a premium on being busy, Cal Newport, author of Deep work: Rules for Focused Success in a Distracted world, recommends building a habit of " deep work" —the ability to focus without distraction.

为了不让大家陷入以忙碌为荣的陷阱之中，《深度工作：在纷扰的世界中成功保持专注的则》的作者卡尔·纽波特建议大家培养“深度工作”的习惯，即培养不受外界干扰、专注的能力。

I think it's very important as an emperor, historically, is of the principle of pedigree.

我认为是非常重要的，作为个皇帝，从历史上来说，是血统则。

The second rule requires a neutral point of view.

第二则是保持中立。

Markets have lost faith that the euro zone's economies, weaker or stronger, will one day converge thanks to the discipline of sharing a single currency, which denies uncompetitive members the quick fix of devaluation.

人们曾相信，欧元区经济体，无论弱国或强国，只要本着使用统货币的则，就能避免了那些缺乏竞争力的国家采取货币贬值权宜之计，就能有朝日实现统——如今市场已经丧失了种信念。

The iPhone is infused with simplicity and beauty.

iPhone奉行简洁美观的则。

The principle for taking samples is for it not to linger.

采集样本的则是不要逗留太久。

Strictly construed, his car is his property, Mr. Gardner.

遵循严格解释则 他的车属于他的财产。

But he was the first who ever did so by choice, out of principle.

但他确实是第个自愿么做的人，是出于他自己做人的则而已。

Perseverance is the fundamental principle in learning English no matter what method you choose.

不管选用什么方法，坚持不懈都是英语习的基本则。

It challenges that most basic of principles of our international system - that borders cannot be redrawn at the barrel of a gun, that nations have the right to determine their own future.

俄罗斯挑战了我们的国际体系中最基本的则——国境线不能通过枪炮来重新划定，国家有权决定自己的未来。

Don't worry. Mr. Blair. As for table manners, there is only one rule you must observe. That is to make yourself at home.

不用担心，布莱尔先。至于席间的礼节，您只要遵守条则就行了，那就是像在家里样不用客气。

To do otherwise would be against our core principles and our business interests.

否则将违背我们的核心则和我们的商业利益。

Natural selection is the cornerstone principle of evolution.

物竞天择说是进化论的基础则。