detectable levels中文什么意思

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A photomultiplier can amplify the signal to detectable levels
光電倍增管可將此訊號(hào)放大到可偵測(cè)的程度。
In the families of babies who had detectable levels of nnal , family members reported smoking an average of 76 cigarettes per week
研究顯示，在那些尿液樣本中含有nnal的嬰兒的家庭中，家庭成員平均每周吸煙76支。
For babies who had no detectable levels of nnal in their urine , the average number of cigarettes reportedly smoked by family members was 27 per week
而那些尿液樣本中未發(fā)現(xiàn)nnal的嬰兒的家庭中，家庭成員平均每周吸煙27支。
Urine from nearly half of the infants contained detectable levels of nnal , a chemical byproduct produced in the human body when it processes nnk , a cancer - causing chemical , or carcinogen , found only in tobacco
在他們生活的家庭環(huán)境中，父母至少有一人是煙民。研究人員在將近一半的尿液樣本中發(fā)現(xiàn)了相當(dāng)水平的nnal 。

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