If two red strips appear, it turns out that the result is positive, if only one strip appears then the result is negative.

如果试纸条上出现两条红色条带则证明结果为阳性，如果只出现一条红色条带则结果为阴性。

youdao

But in control group, positive rate was only less than 5%, and we could only see a single normal DNA strip.

对照细胞呈现阳性染色者每视野不超过5%，DNA凝胶电泳只见一条正常基因组dna带。

youdao

So even if we strip an atom of all of its electrons, we still have that same amount of positive charge in the nucleus.

所以即使把一个原子的所有电子都拿走，原子核还是带那么多的正电。

youdao

So even if we strip an atom of all of its electrons, we still have that same amount of positive charge in the nucleus.

所以即使把一个原子的所有电子都拿走,原子核还是带那么多的正电。

麻省理工公开课 - 化学原理课程节选