detectable levels中文什么意思

例句与用法

1. A photomultiplier can amplify the signal to detectable levels
   光电倍增管可将此讯号放大到可侦测的程度。
2. In the families of babies who had detectable levels of nnal , family members reported smoking an average of 76 cigarettes per week
   研究显示，在那些尿液样本中含有nnal的婴儿的家庭中，家庭成员平均每周吸烟76支。
3. 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
   而那些尿液样本中未发现nnal的婴儿的家庭中，家庭成员平均每周吸烟27支。
4. 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
   在他们生活的家庭环境中，父母至少有一人是烟民。研究人员在将近一半的尿液样本中发现了相当水平的nnal 。