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Hardness is caused by divalent metallic cations.是什么意思？

Hardness is caused by divalent metallic cations.

硬度是由一些两价金属阳离子引起的.

相关词汇
hardness is caused by divalent metallic

hardness

n. 坚硬，<物>硬性，困难，冷酷；
例句
He had slipped from hardness into affability.
他从声色俱厉变得和颜悦色.

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。

caused

人为的；
例句
The report has caused acute embarrassment to the government...
报告将政府置于窘境。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；
例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

divalent

adj. 二价的；
例句
Hardness is caused by divalent metallic cations.
硬度是由一些两价金属阳离子引起的.

metallic

adj. 金属的，金属性的，金属制的，含金属的；
例句
There was a metallic click and the gates swung open...
随着一声金属碰击的咔嗒声，大门打开了。
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
I'm sorry, I've been no use to you.
对不起，我一点儿忙也没帮上。
Profusely sweating and quivering with chills, he murmured his last words.
出了很多汗的他打着冷战，含糊不清地说出了他的遗言。
Check the actual construction of the chair by looking underneath.
看看椅子的下面，检查一下它的实际构造。
Not so long ago, transsexuals were regarded as freaks.
不久前变性人还被视为怪物。
Troops have regained control of the city...
军队重新控制了该市。
Do heredity and environment determine a man’s character?
遗传和环境决定一个人的性格吗?
It is France versus Brazil in the final.
决赛是法国队对巴西队。
Neither of them thought of turning on the lunch-time news. Thus Caroline didn't hear of John's death until Peter telephoned...
两个人谁也没有想到打开电视看午间新闻，所以直到彼得打来电话，卡罗琳才得知约翰的死讯。
...a ferocious guard-dog...
凶恶的看门狗
CT scans identified bullae in all of the patients, with nine having bullous disease.
CT扫描显示所有患者都存在肺大泡, 其中9例患有重症肺大泡病.