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The main useful mineral is celestine.是什么意思？

The main useful mineral is celestine.

矿石组构虽然复杂,但其矿物组成比较简单,有用矿物主要为天青石.

相关词汇
the main useful mineral is celestine

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。

main

adj. 主要的，最重要的，全力的；n. 最主要的部分，重点，主要管道，体力，[航海]公海；
例句
The school occupies split-site accommodation on the main campus...
该学院分散在主校区不同地点。

useful

adj. 有用的，有益的，有帮助的，令人满意的；
例句
A tripod will be useful to align and steady the camera...
三脚架有助于调准和稳定相机。

mineral

n. 矿物，矿石，矿物质，汽水；adj. 矿物的，似矿物的；
例句
...an effervescent mineral water.
含汽矿泉水

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。

celestine

天青石；
例句
This paper shows the test results of certain celestine ore.
论述了某天青石矿浮选试验研究结果.
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He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
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使飞机减速的螺旋形气流涡旋
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你只管先往前走。我随后就来。
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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。
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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。
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Compared with traditional detection method measuring method is simple, precise, facile, with intuitional and believable results.
与传统检测方法相比,具有方法简单 、 准确 、 易实施 、 结果直观可信的特点.
For his dedication the Mayor awarded him a medal of merit.
为表彰他的奉献精神，市长授予他荣誉奖章。
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他说他们将对基地的移交附加一些条件。
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他们一致认为，在家庭价值方面，非洲可以教给美洲很多。
Kevin was always level-headed with both feet on the ground.
凯文总是头脑冷静，脚踏实地。
He painted this picture.
他画了这幅画。
The students always have high jinks at their parties.
学生们在聚会时总是狂欢作乐.
When [ balsam pear ] and { ocean } stirs in the same place.
当 [ 苦瓜 ] 和{洋葱}搅拌在一起.
She woke up with a terrible hangover.
她醒来时宿醉反应很厉害。
Where others of his ilk have battled against drugs, Gabriel's problems have centred on his marriage.
加布里埃尔的同辈都在与毒品作斗争,而他的问题却集中在他的婚姻上。