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The cause of autism is unknown.是什么意思？

The cause of autism is unknown.

自闭症的病因尚不清楚.

相关词汇
the cause of autism is unknown

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

cause

n. 原因，动机，理由，事业；vt. 成为…的原因，导致，引起，使遭受；
例句
Poor posture can cause neck ache, headaches and breathing problems.
姿势不当会导致颈部疼痛、头痛和呼吸困难。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

autism

n. 孤独症，自我中心主义；
例句
The cause of autism is unknown.
自闭症的病因尚不清楚.

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。

unknown

adj. 未知的，不出名的，从未发生的，从不存在的；n. 不知名或不出名的人，未知的事物，<数>未知数，未知数；
例句
It is not unknown for valuable display items to go, ahem, missing.
贵重的展品，呃哼，丢失的话，会众人皆知。
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 children go to bed at 10.30. No one dares argue.
孩子们10点半上床睡觉。没有人敢说不。
Mealwhile staff here will be working upon details on assumption that all consents will be obtained.
这时,假如得到一切方面的赞同,这里的人员将拟订细节.
I bought the encyclopedia on a whim.
我凭一时的兴致买了这本百科全书。
She was wearing a small silver brooch.
她戴着一枚银质的小胸针.
Most ascomycetes are either saprobes or parasites.
大多数子囊菌要么是腐生菌,要么是寄生菌.
It transpired that the fire was caused by a careless smoker.
据传这场大火是由一位粗心的吸烟者造成的.
Behind the scenes, Parsons clashed with almost everyone on the show...
在幕后，帕森斯几乎和剧组的所有人都发生过冲突。
The numbers 7, 8, 9 are consecutive.
7、8、9这三个数字是连续的。
At the same time, CAST Group can design make mould independently aciding to customer request.
同时, 本公司可根据客户需求自主设计和制造模具.
Looks after wages account, shores leaves and liaises with crew's family.
负责船员的薪酬帐目及休假事宜, 并与船员家属联络.