So people now thought symptomless may not be quite as symptomless as they seem.

因此现在被认为没有症状的人也许并不象他们看起来的那样完全没有症状。

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Usually, either the patient or the physician notices an otherwise symptomless lump in the neck.

通常，病人或医生会注意到颈部有一个并无其他症状的肿块。

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Vivax, by contrast, hides in the liver. An individual infected with it may remain symptomless for several years and then relapse.

相反，间日疟隐藏在肝脏中，受感者毫无症状地生活几年后复发。

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Even the critics of stent use and surgery say a subset of symptomless patients may benefit from the procedures.

WSJ: Are Stroke Drugs Better Than Stents?

While not dangerous, and often symptomless in more healthy patients, in the elderly, weak or immuno-suppressed, MRSA can cause fever and pneumonia.

BBC: NEWS | Health | Hospital infections: Case studies

The new screening will invite younger, symptomless patients to have a similar camera check, a flexible sigmoidoscopy, of the lower part of their large bowel to look for any abnormal growths.

BBC: Bowel-cancer screening pilot to begin in England