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这是一个无根据的假设。用英语怎么说？

这是一个无根据的假设。

This is an invalid assumption.

相关词汇
this is an invalid assumption

this

pron. 这，这个，这事，这人，这时，下面所说的事；adj. 这，这个，刚过去的，即将到来的，今…，本…；adv. 这样地，就是这样，这么地；
例句
Victoria Falls has had above average levels of rainfall this year...
维多利亚瀑布今年的降雨量超过了平均水平。

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。

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；
例句
He started eating an apple...
他开始吃苹果。

invalid

adj. 无效的，不能成立的，有病的，病人用的；vt. 使伤残，使退役，失去健康；n. 病人，病号，残废者，伤病军人；vi. 变得病弱，因病而奉命退役；
例句
We cannot accept liability if you are refused entry because of invalid documents.
如果你因证件无效被拒入内,我们不承担责任。

assumption

n. 假定，假设，承担，想当然，采取；
例句
...their assumption that all men and women think alike.
他们关于所有男人和女人思考问题的方式都类似的假定
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
Stop messing about and listen to me.
别再胡闹了, 听我说。
She lit a cigarette with quick, jerky movement.
她用急促的动作点着了香烟。
The traveler brought back some specimens of the rocks from the mountains.
那位旅行者从山上带回了一些岩石标本。
Two prisoners have escaped.
有两个囚犯逃走了。
tepid bath-water
微温的洗澡水
The room bore evidence of a struggle.
这房间里有搏斗过的迹象。
They made a raft and set it afloat.
他们做了一个筏子，使它漂浮在水上。
It's a packet of fries
这是一包薯条
He looked left and right.
他左右看看。
the rules of nomenclature in botany
植物学的命名原则