undetectable

英 [ˌʌndɪˈtektəbl]

美 [ˌʌndɪˈtektəbl]

adj.  看不见的; 察觉不出的; 发现不了的

BNC.33908 / COCA.22327

牛津词典

adj.

• 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。

英英释义

adj

• barely able to be perceived
  1. the transition was almost indiscernible
  2. an almost insensible change
  Synonym:indiscernibleinsensible
• not easily seen

双语例句

• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。