衰期 - 翻译成英语

• half-life
• half-lives

在 中文 中使用 衰期 的示例及其翻译为 英语

在基本条件（pH9）下，水解是主要转化途径（半衰期=6.9天）。
Under basic conditions(pH 9) hydrolysis is a major route of transformation(half life= 6.9 days).

例如，在每周500毫克TC/TE下，睾酮降低到正常范围以下，约需要4次半衰期（32天）。
For example, at 500 mg per week of TC/TE it should take approximately 4 half lives(32 days) for testosterone to drop below the normal range.

这意味着对含pH质5或以下的水体而言，三氯杀螨醇的半衰期预期多于2个月。
This implies that for water bodies with a pH value of 5 or less the half life of dicofol is expected to be> 2 months.

这会加快放射性材料的衰减速度，可能会使废料的半衰期缩短一百倍甚至更多。
This speeds up the rate of decay of the radioactive materials potentially cutting their half lives by a factor of 100 or more.

虽然还不能确定硫丹在大气中的降解速度，但估计其半衰期超过2天的阈值。
There is a uncertainty on the degradation rate of endosulfan in the atmosphere, however it is expected that the half life exceeds the 2 days threshold.

考虑到五氯苯在大气、土壤、沉积物和水里的估算半衰期以及实验半衰期，应当认为该物质具有持久性。
PeCB should be considered as persistent given the estimated and experimental half lives in atmosphere, soils, sediments, and water.

这种办法可能需要评价每一种前体在环境中的降解率或半衰期，并就每一种前体作出风险管理决定。
This approach might require an evaluation of each precursor regarding its degradation rate or half life in the environment and a risk management decision for each one.

在实验室有氧条件下的土壤中半衰期短（在22摄氏度下不超过2天），在相同条件下DT90值不超过10天。
The half-life in soil under aerobic conditions in the lab is low(less than 2 days at 22 °C) and DT90 values do not exceed 10 days under these conditions.

鉴于这个问题令人关注，新的研究也有可能发表有关半衰期的数据，但是现有数据所提供的情况似乎不大可能有大的改变。
Because of interest in this matter, it is likely that half-life data from new studies will be published but the picture provided by existing data seems unlikely to change substantially.

阿拉法特遗物中发现的钋-210半衰期为138天，这意味着该元素每4个半月就会经历一半放射性衰变。
Polonium-210, the isotope found on Arafat's personal effects, has a half-life of 138 days, meaning that half of the substance will decay every four-and-a-half months.

Mackey等人（2006年）报告，根据汽相中与氢氧自由基反应的估计速率常数得出半衰期为0.3-3.3年。
Mackey et al.(2006) report a half-life in air of 0.3- 3.3 years based on an estimated rate constant for vapour phase reaction with OH radicals.

现有数据表明，在酸性（pH4）和中性（pH7）条件下，水解不是谷硫磷转化的主要途径（半衰期分别为38天和37天）。
Available data indicate that under acidic(pH 4) and neutral(pH 7) conditions, hydrolysis is not a major route in the transformation of azinphos-methyl(half lives of 38 and 37 days, respectively).

地表水：涕灭威的化学水解性在环境条件下不会非常明显，因为最短的半衰期170天在pH值达到8.5（15oC）之后才会出现。
Surface water: chemical hydrolysis of aldicarb is unlikely to be significant under environmental conditions since the shortest half life of 170 days did not occur until pH 8.5(15°C).

Tmax和半衰期不受影响。
Tmax and half-life were unaffected.

其半衰期约为34-38小时。
Its half-life is about 34-38 hours.

半衰期约为5730年。
Its half life is about 5730 years.

消除半衰期为17～21小时。
The half excretion is 17- 21 hours.

商业机会有半衰期，就像铀一样。
Business opportunities have a half-life, just like uranium.

当半衰期结束时，她说，我想你漂浮在系统之外，进入星星。
When half-life is over, she had said, I think you float out of the System, out into the stars.

除此之外半衰期超过一小时的同位素还有三种：211Rn、210Rn和224Rn。
There are three other radon isotopes that have a half-life of over an hour: 211Rn, 210Rn and 224Rn.