An objective set of rules which we all agree to accept is necessary for any ordered society.

任何井然有序的社会都需要一套客观公正、为大家所接受的规则。

《柯林斯英汉双解大词典》

For her, books were as necessary to life as bread.

对她来说，书就像面包一样是生活的必需。

《柯林斯英汉双解大词典》

For him, reading was a necessary prelude to sleep.

对他来说，阅读是入睡的必要前奏。

《柯林斯英汉双解大词典》

He said this is necessary for the country to compete among some of the world's fastest growing economies.

VOA: special.2010.08.12

The kind of discipline and self-restraint necessary for an educated mind appears, for him, to be unequally divided among human beings.

那种受过教育者,所必备的纪律与自制，对他而言似乎是不平等地,区隔了人群。

耶鲁公开课 - 政治哲学导论课程节选

It is necessary, he says, for the prince to know well how to use the beast and the man, he writes.

他说，君主有必要清楚的知道,怎样去利用禽兽和人类。

耶鲁公开课 - 政治哲学导论课程节选

However, he also has to complete reforms necessary for Poland to qualify for membership of the European Union (EU) - a move opposed by some coalition partners and likely to result in further economic pain.

BBC: Economic tests for new Polish regime

Here, too, to understand the president's actual goal it is necessary to search for the answers closer to home.

CENTERFORSECURITYPOLICY: Obama's Arabian dreams

QDRs have been criticised for coming up with somewhat vague transforming plans while failing to make the savings necessary to pay for them.

ECONOMIST: The Quadrennial Defence Review