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分之一

网络ppm; ppb; 1ppm

分之一

网络释义

分之一

ppm

化学品的主要污染是移动的金属离子，通常须限制为百分之一（ PPM）级或更低。一些供应商可制造MIC级的化学品，含量仅 …

ppb

...14种元素，在人体内只占百万分之一(ppm)～万万分之一 (ppb)，这十几种元素加在一起，仅占人体重量的0.05％，称之为生 …

1ppm

分之一(1ppm)，为了适应超大规模集成电路制造技术的发4 n. H5 B3 h' ?6 R展，提高动力源的输送质量，超纯气体、超纯水所 …

part per cent

食品添加物知识补充，塑化剂... ... (part per trillion) 兆分之一 (percent: part per cent) 分之一 (part per million) 万分之一 ...

1ppb

...剂(如endrin,C12H8Cl6)在低於十亿 分之一(1ppb)的浓度即有对鱼致命的毒性，无脊椎动物则更敏感。

例句：

The researches had been able to put flat plates a millionth of a meter apart .

研究者们曾经使让两个平的薄片处于百万分之一米的距离。

Even when managers do get away , one -quarter check e-mails and voicemail messages , and 13 per cent call the office at least once a week .

即使经理人真的去度假，其中也有四分之一要查阅电子邮件和语音留言，还有 13%的人至少每周要给办公室打一次电话。

Palestinians have access to only a fifth of the water supply , while Israel , which controls the area, takes the rest, the bank said .

世界银行称，巴勒斯坦人只可以使用五分之一的供水，而控制这个地区的以色列却拿走了五分之四。

In discussing titrations of acid and base solutions , it is often convenient to think in terms of milliequivalents.

在讨论酸碱溶液的滴定时，习惯上考虑到的是千分之一等当量。

To put this into perspective , I'm talking about hundreds of customer applications and of those, only 1-2% of the total required changes .

就这一点而言，在我讨论过的数以百计的客户应用程序中，只有其中的百分之一到百分之二需要更改。

I had been taken back to my room after surgery , one-quarter awake and feeling as if I had just tumbled over Niagara Falls in a barrel .

术后我被推回房间，大概只清醒了四分之一，感觉我想是被装在一只桶里在尼亚加拉大瀑布上翻滚。

The men who worked the cattle in the treeless expanses of the West , at least one-fourth of them blacks , became known as cowboys .

那些在荒芜广阔的西部驱使牛工作的人有至少四分之一是黑人，他们被认知为牛仔。

By these three was the third part of men killed , by the fire , and by the smoke, and by the brimstone, which issued out of their mouths .

口中所出来的火，与烟，并硫磺，这三样灾杀了人的三分之一。

Howard Webb, the English referee retained by Fifa for the quarter-finals , said he would be open to the introduction of goalline technology .

继续留在国际足联世界杯上执法四分之一决赛的霍华德·韦伯说，他赞同国际足联引进门线技术的做法。

China says it has exploited just a third of its total hydropower reserves , compared to more than 80 percent in the United States and Japan.

中国表示，这还仅仅只利用了其三分之一的水能总量，与美国和日本 80%的发开量是有差距的。

Carlo Ancelotti has tried to stay out of the matter and focus on Thursday 's Coppa Italia quarter-final .

卡尔洛·安切洛蒂试图置身事外，全力以赴周四意大利杯的四分之一决赛。

In 1981 its output of scientific papers was one-seventh that of India ; by 2008 it had almost caught up with India .

该国 1981年的科研论文产量是印度的七分之一，而到 2008年，它几乎赶上了印度。

Anecdotal evidence from corporate treasurers suggests that perhaps a third of the bank loan explosion this year has ended up in stocks .

来自企业财务部门的坊间证据表明，今年新增的银行贷款中，可能有三分之一投入了股市。

He felt his own responsibility was enhanced by the fact that he was the spokesman of 400 million people , one quarter of the human race.

而代表占人类人口四分之一，也即四亿中国人说话，这一事实使他感到自身的责任格外重大。

And it is a disaster : One of out of every five U. S. foreclosures this year was in California.

这的确是场灾难：今年五分之一的抵押品赎回取消都是在加利福尼亚州。

He owns more than a quarter of Facebook 's stock and controls votes for three of five board seats , say people familiar with the matter.

他拥有 Facebook 四分之一以上的股份，控制着五个董事会席位中的三个。

However , production of the gas is currently just a quarter of that.

然而，目前煤层气的产能刚刚达到该目标的四分之一。

The recycle time of the authentication key is at least one-third , and not more than one-half, that of the cookie time-out value .

身份验证密钥的再循环时间至少是 Cookie 超时值的三分之一，并且不得超过一半。

A third of men say they have no confidence when it comes to Christmas cooking , with a fifth saying they feel lost in the kitchen .

三分之一的男性说他们对于烹饪圣诞节大餐没有信心，五分之一的男性说他们在厨房里毫无头绪。

He said he spent a mere $150 , 000 on his Iowa campaign , and a third of those who voted for him paid for their own tickets .

他说，他在艾奥瓦的选战中只花费了区区 15万美元，有三分之一投他票的人是自己花钱买的入场券。

India's GDP is just a third of China's, but its growth rate of more than 6% a year lifted average incomes over $1 , 000 for the first time .

印度的国民生产总值只有中国的三分之一，但超过 6%的年均增长率使得其平均收入首次突破一千美元。

Since he had put a quarter of his money in the pot already , he reasoned that he would do what he could to come out victorious .

既然他已经在这局牌中下注了四分之一的钱，他认为他要尽一切可能来取得胜利。

分之一

分之一

ppm

ppb

1ppm

part per cent

1ppb

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