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这是持久不变的。用英语怎么说？

这是持久不变的。

It is unchangeable and permanent.

相关词汇
it is unchangeable and permanent

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；
例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

is

vt.& vi. 是（be的三单形式；n. 存在；
例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

unchangeable

--
例句
The law with exclusive and unchangeable market of baric graceful ? is going forever namely.
的确,市场唯一不变的法则就是永远在变.

and

conj. 和，与，而且，于是，然后，因此；
例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

permanent

adj. 永久（性）的，永恒的，不变的，耐久的，持久的，经久的，稳定的，常务的，常设的；n. 电烫发，烫发；
例句
...if France cannot persuade all five permanent members of the Security Council to back the plan...
如果法国不能说服安理会五个常任理事国都支持该计划
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。
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。
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。
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
The ship cleared from Hong Kong.
这艘船由香港开出。
I'll find out about planes to New York.
我去打听一下飞纽约的班机。
Work went on as usual inside, uninterrupted by outside repairs.
外部装修, 内部照常营业。
to caulk a pipe joint
堵住水管接头的缝隙
He repudiated his first wife and married her sister.
他和第一个妻子离了婚，又娶了她的妹妹。
The divorce turned his whole world upside down .
离婚把他的一切都搞得颠三倒四。
He is industrious about his study.
他勤奋学习。
The old woman nagged (at) her daughter-in-law all day long.
那老太婆一天到晚地挑剔儿媳妇的不是。
Have you ever thought of going in for teaching?
你曾想过从事教书的工作吗?
The news came as a bombshell.
这个消息令人震惊。