Primary tuberculosis is symptomless in the great majority of individuals.

原发性肺结核是无症状在绝大多数个人。

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。

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。

The study also showed that cultivars of symptomless and high resistance were 37%, high susceptibility cultivars were 23.5%.

研究还显示，参试材料中无症状和高抗品种约占37%，高感类型占23.5%，其余为中间型。

But high initial death rates often fall as officials find that the causative microbe also causes mild, even symptomless cases.

常常开始有高死亡率，像官方发现的，致病微生物也能引起轻微的，甚至是没有症状病例。