undetectable

adj.

1. 看不见的；察觉不出的；发现不了的
   impossible to see or find
   1. The sound is virtually undetectable to the human ear.
      这声音实际上是人耳难以听得到的。

1. Polar Bears are nearly undetectable by infrared cameras, due to their transparent fur.
   红外线摄像机几乎探测不到北极熊，因为它们的皮毛是透明的。
2. In recent years, scientists have demonstrated that subtle chemical variations in many foods, including honey undetectable to the tongue or the naked eye can give a strong indication of where it originated.
   近年来，科学家已证明，在包括蜂蜜在内的许多食物中，通过舌头和肉眼均无法察觉的细微化学变化，可以充分表明其原产地是哪儿。
3. But that means the soul isn't really undetectable.
   但是这就意味着，灵魂不是完全不可检测的。
4. Thus, although HAART may achieve undetectable virus levels in the blood, virus replication in the testis may permit continued spread of the virus.
   这样，即使高强度的抗病毒治疗能够使得血液中病毒达到检测不到的水平，睾丸组织中病毒的复制仍然可以成为传染源。
5. The sweet smell of success might, in other words, actually be undetectable.
   换句话说，胜利的甜蜜气味是无法觉察的。
6. Osteopontin-c was detected in16 of the20 tumors ( 80%) and was undetectable in the22 normal specimens, the researchers report.
   研究人员报告在20个肿瘤中有16检测到骨桥蛋白C（80%），但在22例正常标本中没有被检测到。
7. There we read the Buddha's words on how cream of ghee is always present within all forms and modifications of milk, but is undetectable until it has been purified of its obscuring elements.
   那里我们读到佛经的文字如何酥油的精华表现为所有的形式和牛奶的改变，但是它是无法察觉的直到它已经给从它遮蔽的元素之中纯化了。
8. The peak force and peak pressure greatly increased in some donor great toes, but distinctly decreased, even undetectable for some others.
   部分供足砪趾的峰压力、峰压强异常增高，而另有部分供趾的则明显降低甚至缺失；
9. Although hair transplants have advanced to the stage where they are virtually undetectable ( no more plugs of hair), they still rely on moving hairs from one place to another.
   虽然头发移植技术已经发展到使种植的毛发外观自然（与周围的头发无区别），但该技术仍然要靠从一皮瓣到另一条皮瓣置换。
10. Instead, their brain waves are very slow and weak, sometime all but undetectable.
    代之为非常缓慢和微弱的脑电波，有时甚至不能监测到脑电活动。
11. In most cases, the protein that PTEN produces was undetectable in tumor cells, but clearly present in nearby normal cells.
    在大多数的病例的肿瘤细胞中都检测不到PTEN产生的蛋白，但这种蛋白存在于周围的正常组织中。
12. Be careful to benchmark before making a decision on this basis: the overhead of Spring AOP proxying is all but undetectable in normal use.
    在这个基础上做决定前要小心基准：SpringAOP代理的负载在通常使用中是无法觉察到的。
13. Like a criminal he began to fashion in his own mind the undetectable crime.
    好像一个罪犯，他开始通盘考虑这件不能为外人发现的罪行。
14. The null result of the Michelson-Morley experiment suggests that the effects of the ether are undetectable.
    迈克耳孙-莫雷实验的否定结果使人想到，以太的效应是不能检查到的。
15. Three months after ribavirin therapy commenced, HEV RNA was undetectable in serum samples from all patients.
    在开始单独使用利巴韦林治疗后，所有患者血清样本中检测不到HEVRNA水平。
16. And the distance between driving a used Hyundai Elantra and a new Jaguar XJ is well nigh undetectable compared with the difference between motoring and hiking through the muck.
    试想一下，开一辆二手的现代伊兰特与开一辆崭新的美洲豹XJ之间的差别，肯定没有开车与徒步跋涉烂泥滩之间的差别明显。
17. The advantage to criminals is that kernel malware is usually undetectable when using standard antivirus and antispyware applications.
    罪犯的优势是内核恶意软件用标准抗病毒和抗间谍应用程序通常检测不到。
18. All welds shall be undetectable in finished work.
    完成设备的所有焊接应无法探察。
19. It's still possible that some as-yet-unknown genetic factor, undetectable by even the most advanced tools, may explain the discordance in the study.
    仍然有可能的是，一些未知的遗传因素，即使是最先进的工具也发现不了，这些也许能解释研究中不一致的地方。
20. They also had undetectable leels of virus in the brain and low leels in the spleen.
    而对病毒在脑的水平及在脾中的低水平表达时他们也不能检测。
21. Seven out of eight patients who got the highest dose of the drug had undetectable levels of the virus.
    八名患者中七名在服用最大剂量药物后探测不到病毒水平。
22. The implication is that the effect is to make what was undetectable detectable.
    这就意味着它的效果，就是让未曾现形的密码现形。
23. Almost undetectable with even the most delicate instruments.
    即使最精密的仪器都几乎无法察觉的。
24. S.defense technology to China, including data on an electronic propulsion system that could make submarines virtually undetectable.
    技术中包括一种让潜艇不可侦测的电子推进系统有关的数据。
25. Fine-grained homogeneous rock ( such as basalt) containing minerals undetectable by the naked eye.
    成分细密的同质岩石（如玄武岩）含有肉眼看不见的矿物。
26. Picking locks is now undetectable to everyone standing around watching.
    开锁现在不被那些在周围守卫的人注意。
27. It was more likely that the virus was still present but had retreated to undetectable levels in MR stimpson's blood.
    这更象是病毒依然存在，只是血液中病毒的量已经少到检测不出的水平。
28. Shock, with diminished consciousness, lack of urine output, cool, moist extremities, a rapid and feeble pulse, low or undetectable blood pressure, and pale skin.
    休克，意识减弱，尿少，体凉，四肢潮湿，脉动快速和微弱，低血压或检测不到血压，皮肤苍白。
29. So Plato could still insist things that are invisible in the sense of undetectable can't be destroyed.
    所以柏拉图仍旧可以坚持说无形的东西，无形这里指不能检测到，是不能毁灭的。
30. The Caraway and liquorice compounds reached their peaks in the breast milk two hours after consumption, while the banana compound became undetectable after one hour.
    香菜和甘草在乳汁中的含量在进食后2小时达到高峰，而香蕉化合物在1小时后就检测不到了。

adj

1. barely able to be perceived
   1. the transition was almost indiscernible
   2. an almost insensible change

   Synonym:    indiscernibleinsensible

2. not easily seen