有必要对儿童进行吸毒危害的教育。
没有必要把模拟转换为数字数据。
禁止吸烟会免除不必要的死亡。
对鲸的屠宰是不必要且不人道的。
政府在必要时可以动用军队。
The government, when necessary, has recourse to the armed forces.
酵母对酿酒的发酵是必要的。
Yeast is essential for the fermentation that produces alcohol.
起初把头疼分成若干类别是有必要的。
It is necessary initially to classify the headaches into certain types.
我们仍在寻觅兼备所有必要才能的人选。
We are still looking for someone who combines all the necessary qualities.
我们没必要节省—再吃点！
可能也有必要提供这篇文学评论的摘要。
It might also be necessary to supply an abstract of the review of the literature as well.
有必要调查一下怎样才能实施这些方案。
It is necessary to examine how the proposals can be carried out.
各种人际交往技巧的训练是非常必要的。
她拒不承认改革的必要性。
停火是谈判的必要前提。
人们没能理解那场战争继续下去的必要性。
The population failed to understand the necessity for the war to go on.
不必要的资源重复会导致严重的效率损耗。
There could be a serious loss of efficiency through unnecessary duplication of resources.
他在和国王讨论保留骑兵全部兵力的必要性。
He was arguing with the king about the need to maintain the cavalry at full strength.
出版者负责取得准予复制插图的必要许可文件。
The publisher is responsible for obtaining the necessary permissions to reproduce illustrations.
要使各国的工资水平均等，这些措施是必要的。
Such measures are needed to equalize wage rates between countries.
英美战舰已做好准备一有必要就撤出本国公民。
British and American warships are standing by to evacuate their citizens if necessary.
宵禁令是应对突发事件时必要的临时权宜之举。
The curfew regulation is a temporary expedient made necessary by a sudden emergency.
联合国秘书长谈到了个人自由和人权的必要性。
The United Nations Secretary-General has spoken of the need for individual freedoms and human rights.
新闻界小题大做，促成了一场不必要的经济危机。
The press, making a mountain out of a molehill, precipitated an unnecessary economic crisis.
要理解他们为什么这样做，有必要知道他们的想法。
To understand why they are doing it, it is necessary to know where they are coming from.
“我想我们应该看个专家。”—“我认为没那必要。”
"I think we should see a specialist."—"I don't think there's any need for that."
在专业剧院里，证明自己是个专业人士是非常必要的。
In the professional theatre, there is a tremendous need to prove that you're a pro.
那么你是说，这将会坚定美国公众在必要时参战的决心？
So you're saying this will strengthen the American public's resolve to go to war if necessary?
这些观点中有些值得进一步探究，但是没有必要全部重来。
Some of these ideas are worth pursuing, but there is no need to reinvent the wheel.
既然科学成本上涨快于通货膨胀，资助上的一些限制是必要的。
Since the costs of science were rising faster than inflation, some restriction on funding was necessary.
聘请受过训练做调解人的律师，就没必要再找独立的法律咨询了。
The use of a lawyer trained as a mediator would obviate the need for independent legal advice.
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