In other words, "there was no detectable level" of nicotine that was considered harmless, the researchers wrote.
换而言之，不存在尼古丁的“无法检测级别”以视为无害，研究人员如是说。
This project is based on the hypothesis that in some cases domain organization of proteins may be conserved even if some domain sequences diverged beyond detectable level of sequence similarity.
这个专题是根据一个理论：在某些例子中，即使功能区块的序列相似度在可以侦测的范围之外，蛋白质功能区块的结构可能会是保存的。
The concept relies on the fact that the ear not only senses sound but also makes noises of its own, albeit at a level only detectable by supersensitive microphones.
这一设想的依据是：人耳不仅只是感知声音，它自己也同时在发出声音，即使其强度只有超灵敏拾音器才能侦测到。
This level is the amount of dioxins that can be ingested over lifetime without detectable health effects.
这种剂量是在对健康无可察觉的影响下终身可摄入的二恶英剂量。
Collaborating with Princeton researcher Robert Dicke, the pair confirmed Dicke's hypothesis that the original big bang left behind low-level radiation detectable throughout the universe.
他们与普林斯顿大学的研究者罗伯特·迪克合作，验证了迪克提出的假设，也就是最初的大爆炸使得整个宇宙都充满了可以检测到的微弱辐射。
Results The average equivalent sound level and the detectable rate of workers hearing loss were exponential positive correlation, the coefficient of correlation r was 0 812 45.
结果听损检出率随平均等效声级的增加而呈明显的增加趋势，平均等效声级与噪声作业人员的听损检出率呈密切的指数正相关关系（相关系数r为0 812 45 ）。
The lowest level of lead that can be practicably obtained in lipstick is non-detectable, according to our test results.
但根据我们的测试，在唇膏中可以被测到的最低含量是零含量。
In the case of valeric acid, for example, that concentration was seven parts per trillion-a level only just detectable by bloodhounds.
比如，缬草酸的汗臭味浓度为万亿分之七，这种浓度只有警犬才能发觉。
In the case of valeric acid, for example, that concentration was seven parts per trillion-a level only just detectable by bloodhounds.
比如，缬草酸的汗臭味浓度为万亿分之七，这种浓度只有警犬才能发觉。
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