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Mnemonics are not optional.是什么意思？

Mnemonics are not optional.

访问键不是可有可无的,而是必须要有的.

相关词汇
mnemonics are not optional

mnemonics

n. 记忆术，记忆法，记忆的，记忆术的( mnemonic的名词复数 )，助记术；

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

optional

adj. 可选择的，随意的，任意的，非强制的，选修科目；
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
Now, my uncle seemed so miserly that I was struck dumb by this sudden generosity.
原来似乎是非常小气的伯伯竟突然间慷慨起来,这倒一下子把我弄得目瞪口呆.
We shall not cumber our thought with his reproaches.
我们不要受他责难的影响,思想裹步不前.
They know how easily group process can become dysfunctional.
他们知道群体作用会多么容易使机能失调.
He finally agreed, albeit reluctantly, to help us.
尽管勉强，他最后还是同意帮助我们。
Button icons, a default button, HTML in a button, and button mnemonics.
按钮图标, 默认按钮, HTML格式的按钮, 按钮助记符.
Suddenly he felt the fresh and sharp night air and he knew that the mistral was blowing.
突然间，他呼吸到了夜晚新鲜寒冷的空气，他知道这是寒冷干燥的强风。
Finally , spatial temporal speed figure was introduced to help find the headstream of congest.
介绍了用时空速度变化图寻找拥挤源头以及选择交通控制措施的方法.
I'll record to our habitat office waive our claim immediately.
我立即写信给咱们的总公司提出放弃索赔.
It is hard to make out what criteria are used.
很难弄清楚使用的是什么样的标准。
The horse completely mistimed the jump and threw its rider.
这匹马起跳完全不是时候，把骑手摔了下来。
He is infatuated with her, and doesn't see her faults.
他对她着了迷, 看不出她的缺点.
His ruddy face still routinely creases with mirth.
他红润的脸庞仍旧时常笑得堆起褶子。
The basic feature of positive comity is its voluntariness.
积极礼让的基本特征是它的自愿性.
In 1952 she wed film director Roger Vadim.
1952年她嫁给了电影导演罗杰·瓦丹。