But while the snub shape may be attractive, it is not necessary a blessing.
尽管翘鼻子可能有魅力，但这未必是福。
The SOA ontology defines a composition as a subclass of a system, thus emphasizing that while a composition is a system, a system is not necessary a composition.
SOA本体将组合定义为系统的子类，所以，它强调：组合是一个系统，而系统不一定是组合。
This is a necessary consequence of progress.
这是发展的必然后果。
For him, reading was a necessary prelude to sleep.
对他来说，阅读是入睡的必要前奏。
This was a dreadful crime and a severe sentence is necessary.
这是一种骇人听闻的罪行，重判是必要的。
I may look like a tenderfoot, but I think I can follow a trail or carry a pack if necessary.
我也许看起来像个新手，不过有必要的话我认为我也能跟着上路或扛包。
A radical overhaul of the tax system is necessary.
有必要彻底改革税制。
A clearly quantifiable measure of quality is not necessary.
一种确切的可计量的质量检测是不必要的。
It's a necessary condition for many worthwhile things: child care, friendships, etc.
对于许多有价值的事情而言，如儿童看护和友谊等，它是必要的条件。
Higher taxes may be a necessary evil.
提高税率虽不是件令人愉快的事，但可能是必要的。
It may also be necessary to get a new appraisal of the property.
可能还需要对该房产做个新的估价。
At least a year's preparatory work will be necessary before building can start.
在建造开始之前至少需要一年的准备工作。
The curfew regulation is a temporary expedient made necessary by a sudden emergency.
宵禁令是应对突发事件时必要的临时权宜之举。
Responsibility and reliability are necessary qualifications, as well as a friendly and outgoing personality.
责任感和可靠性是必需的素质，友善和外向的性格也必不可少。
It may be necessary to buy a new one.
也许有必要买个新的了。
It might be necessary to make a few slight modifications to the design.
也许有必要对这个设计稍作几处修改。
Previous teaching experience is a necessary qualification for this job.
教学经验是担任这项工作的必备条件。
It is not, in principle, necessary for a biological system to age and die.
原则上来说，生物系统的衰老和死亡都不是必然的。
It is necessary that a critic develop a sensibility informed by familiarity with the history of art and aesthetic theory.
批评家必须在熟悉艺术史和美学理论的基础上培养一种感性。
Practice is a necessary step in learning and it will benefit the kids for a life time.
练习是学习的必要步骤，它会使孩子受益终生。
It is necessary that a person exercises regularly if he wishes to remain healthy.
如果一个人想保持健康，他就有必要定期锻炼身体。
In short, a good and harmonious environment at home is necessary for a child to grow healthy.
总之，良好和谐的家庭环境对孩子的健康成长至关重要。
This is a far cry from the funds necessary for a problem of such magnitude.
这与解决如此重大的问题所需的资金相差甚远。
He said a foreign language was necessary for a person to have a better future.
他说为了有一个更好的未来，学习一门外语对人们来说是有必要的。
It's necessary to bring a gift.
带礼物是有必要的。
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