necessary
释义
adj.必需的；不要的；
出现位置
小学-译林版 · 译林版八年级英语下册 · Unit 6 Sunshine for all
例句（20 条）
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No gimmickry or hoopla is necessary.
无须耍花招或大吹大擂。
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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。
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It may be necessary to buy a new one.
也许有必要买个新的了。
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She searched her desk for the necessary information.
她在她的书桌里搜寻必要的资料。
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For pants without that crease (and many with it), pleats are unnecessary; for pants that need the pleat, they only need one.
对于没有折痕的裤子（以及许多有折痕的裤子），褶皱是不必要的；需要打褶的裤子只需要一条。
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Sometimes it is necessary to say no.
有时候说“不”是必要的。
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Military action may become necessary.
军事行动可能会成为必要。
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I'll make the necessary arrangements.
我会做一些必要的安排。
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I hate unnecessary waste.
我憎恨不必要的浪费。
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We will use air power to protect UN peacekeepers if necessary.
必要时我们会动用空军力量来保护联合国维和部队的安全。
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If necessary I can come at once.
如果有必要，我可以马上来。
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Repairs are necessary to strengthen the bridge.
这座桥需要加固。
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Two or three friends, a small tent, sleeping bags, food and drink are necessary.
两三个朋友、一个小帐篷、睡袋，还有食物和饮料都是必要的。
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A friendly nod or a wave of acknowledgement in response to an act of courtesy helps to create an atmosphere of goodwill and tolerance so necessary in modern traffic conditions.
对礼貌行为的友好点头或挥手感谢有助于创造带有善意的宽容氛围，这在现代交通条件下是非常必要的。
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It is necessary that we weigh the pros and cons of including English words in Chinese dictionaries.
权衡在汉语词典中加入英语单词的利弊，这对我们来说是很有必要的。
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Timber ran short, and it was necessary to procure it from farther and farther away.
木材短缺，必须从越来越远的地方获得。
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Is advertisement really necessary?
广告真的有必要吗？
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With fertilizer prices jumping nearly 50% per metric ton over the last year in some places, human waste is an attractive, and often necessary, alternative.
去年，在一些地方，每公吨化肥的价格上涨了近50%，因此人类粪便也就成了一个有吸引力、通常也是必要的替代品。
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Since a number of parents in Centerville have complained that they are too busy to teach their teenagers to drive, some other instruction is necessary to ensure that these teenagers are safe drivers.
由于森特维尔有不少家长抱怨说，他们太忙了，没有时间教青少年开车，所以为了保证这些青少年的安全驾驶，一些其他的指导是必要的。
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They would take any action deemed necessary.
他们会采取认为必要的任何行动。