Necessary
[ 'nɛsəsɛri ]
第1级
其它 Other
adj. 必要的;强制的;必然的;不可避免的;
n. 必需品;
💡 词根助记
necess必要 + ary 表示有...性质的， → a.必要的；必然的
📝 例句
An added voltage is necessary to overcome the barrier thus created.
必须增加一个附加电压去克服这样引起的位垒。
"Vigorous state action" was necessary.
“强有力的国家行动”是必不可少的。
All necessary materials should be on hand.
一切必须的材料应准备就绪。
Oxygen is necessary for life.
氧气是生命所必需的。
An autoclave is usually necessary for preparation of the culture media.
培养基通常要进行高压杀菌。
🌱 联想助记
【记】※ ne-拼音“哪”,ce-拼音“厕”,ss-两个美女(s似“美女”),a-一,ry-拼音“人妖”:哪咤认为在厕所里帮两个美女抓一个人妖是必要的
※ ne-拼音“哪”,ce-拼音“测”,s-拼音“试”,sa-拼音“沙”,r-拼音“让”,y-拼音“疑”:哪咤来测试沙和尚的武功是必要的,不让唐僧疑虑
✅ 同义词
🔴 反义词
🔤 词根
-ary既表示“(形容词缀)...的”
又表示“某种人”
常见的变体有-ory
📖 牛津释义
necessary
adj
1 essential for a purpose; that cannot be done without or avoided 必须的; 必需的; 必不可少的; 不可避免的
I haven't got the necessary tools. 我没有必需的工具.
Is it necessary for us to meet/necessary that we meet? 我们非见面不可吗?
She hasn't the experience necessary for the job. 她没有做那事所需要的经验.
Sleep is necessary to/for one's health. 睡眠对健康是必不可少的.
2 that must be; inevitable 必然的; 必定的; 无可避免的
If a = b, and b = c, then the necessary conclusion is that a = c. 设a = b, b = c, 则结论必定是a = c.
the necessary consequences 必然的结果.
3 (idm 习语) a ,necessary `evil thing that is undesirable and possibly harmful but must be accepted for practical reasons （按照实际情况）不得不认可的不合意甚至有害的事物
The loss of jobs is regarded by some as a necessary evil in the fight against inflation. 有些人认为要遏止通货膨胀就难免有人得失业.
🎯 考研助记
哪咤(ne)嫦娥(ce)两条蛇(ss)照看一棵(a)树苗(ry)是 必须的 两个e夹着c跟了两个s
🏥 医学释义
①必要的，必需的 ②必需品
🌿 同词根单词
📖 同为「计算机」词汇
查看全部计算机词汇 ›🗣️ 情景例句
First I heard a noise.
我最先听见一阵响声。
No, more, about 130 years ago. Most of the slave owners were rich farmers who lived in the south. They wanted to keep their slaves.
不，还要早，大约130年前。大多数奴隶主都是住在南方的富有的农场主。他们想保留自己的奴隶。
Does she have your number?
她有你的电话号码吗？