Additional testing in a WHO collaborating laboratory may produce inconclusive or only weakly positive results.

在世卫组织合作实验室的补充检测可产生不确定或仅仅弱阳性结果。

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But the process was cheaper involving a weakly developed negative being placed on back card or paper to appear as a positive.

这种方法廉价些，因其把微弱曝光的负片放在背板或背纸上作整片。

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Result Expression of CD44 in renal biopsy of controls was negative in the glomeruli and weakly positive in renal interstitium .

结果在正常肾组织中，CD44在肾小球、肾小管无表达，肾间质可见CD44呈弱阳性表达。

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