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这些岛屿是由火山构成的。用英语怎么说？

这些岛屿是由火山构成的。

The islands are volcanic.

相关词汇
the islands are volcanic

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；

islands

n. 岛，岛屿( island的名词复数 )，群岛；

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）；

volcanic

adj. 火山的，猛烈的，暴烈的；n. 火山岩；
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
Engineers are still trying to come up with a commercially viable replacement for internal-combustion engines.
工程师在设法制造一种在商业上切实可行的发动机来取代内燃机。
Brooks may be considered as a trustworthy man.
布鲁克斯可以被认为是一个可靠的人。
Don’t tinker with the TV.
别瞎弄电视机。
The stress on the last syllable is light.
最后一个音节是轻音节。
Synchronize your watches.
把你们的表校到同一时间。
Subsequent events vindicated the policy.
后来的事实证明那政策是对的。
He led a varied life.
他过着丰富多彩的生活。
The floods found a vent through the dikes.
洪水将河堤冲了一个缺口。
to an undeniable degree
到了不可否认的程度
He made a very telling speech about their mistakes.
他就他们的错误作了有力的发言。
His luggage was lost in transit.
他的行李在运送中丢失。
We may continue the traction up to three weeks,until the fracture is healed.
我们可以继续牵引三周,直到骨折痊愈为止。
a tenable theory
站得住脚的理论
Because Linux works on the basis of open-source code, anyone can theoretically tamper with a program.
因为Linux建立在开源代码的基础上，理论上任何人都可以干预一个程序。