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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
The thieves fled, ramming the policeman's car...
小偷撞了警车后逃走了。
I'm going to get some water. I'll be right back.
我去拿点水。马上就回来。
I cleaned myself up a bit, and got the baby ready.
我拾掇了一下自己，把宝宝也收拾妥当。
She has freelanced as a writer and researcher.
她从事自由职业，一边写作，一边搞研究。
Water won’t touch these grease spots.
水洗不掉这些油斑。
She smiled proudly, and two dimples appeared in her cheeks.
我看见她的脸上起了一道薄薄的红云,接着又露出很温和的微笑, 两颊上微微现出两个酒窝.
To study tissue distribution of TTV in experimentally infected Rhesus monkey andTT virus is hepatotropic.
通过TTV在恒河猴的实验感染,了解TTV的嗜肝性及其在各组织中的分布.
His breathing became more rhythmical.
他的呼吸变得更有节奏了.
The baptismal pool was just above the choir loft.
洗礼池就在唱诗班楼座上方.
We're all mortals , with our human faults and weaknesses.
我们都是凡人, 自然都有过错和弱点.