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The serum is vitiated byexposure to the air.是什么意思？

The serum is vitiated byexposure to the air.

血清暴露在空气中已变质.

相关词汇
the serum is vitiated to air

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。

serum

n. <医>血清，血浆，浆液，树液，乳清；
例句
There lied interaction between probiotics and acidifier on improving the serum IgG level ( P & lt; 0.05 ).
酸化剂、益生素和寡糖合用较对照组和单独添加降低大肠杆菌数量,较单独使用降低淋巴细胞转化率,但差异不显著 ( P & gt; 0.05 ).

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。

vitiated

v. （使）削弱( vitiate的过去式和过去分词 )，（使）破坏，（使）损害，（使）无效；
例句
Strategic policy during the War was vitiated because of a sharp division between 'easterners' and 'westerners'...
由于“东方人”和“西方人”之间存在巨大的分歧，战争期间的战略方针没有得到切实的执行。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；
例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

air

n. 天空，空气，空中，神态，曲调；v. 晾干，通风，公开发表，播送；
例句
Plants absorb carbon dioxide from the air and moisture from the soil...
植物从空气中吸收二氧化碳并从土壤中汲取水分。
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 underside of the rock was covered with seaweed.
岩石的下面布满了海草.
Our anxieties can also be controlled by isolating thoughts, feelings and memories...
我们也可以通过将一些想法、感情与记忆分开考虑以控制焦虑情绪。
John wondered what Elisha was thinking - Elisha, who was tall and handsome , who played basketball.
约翰不知道伊莱沙此时在想些什么 —— 他, 伊莱沙,高高的个子, 面清目秀,会打篮球.
You can take the maglev train at Pudong Airport.
你可以从浦东国际机场乘坐磁悬浮列车.
...the Scottish tourist industry.
苏格兰旅游业
Later we received resumes of what she had said.
后来我们收到她讲话的摘要.
You are all fortunate to be growing up in a time of peace and plenty.
你们都很幸运，成长在和平富足的时代。
After hard fighting, the defenders were still masters of the city.
守军经过奋战仍然控制着城市.
The grass was a vibrant green.
草地绿油油的。
...her villainous father.
她那个恶棍父亲