Once there, the sgRNA scans the genome, looking for the complement of its target sequence.

一旦进入核内，单向导RNA会扫描基因组，寻找其靶序列的互补序列。

To perform RT-PCR, some of the extracted sample from the nasopharyngeal swab is added to a solution containing an enzyme called reverse transcriptase, nucleotides and primers that are complimentary to a specific SARS-CoV-2 target sequence.

RT-PCR的操作步骤是：首先将鼻咽拭子的部分样本加入到含有逆转录酶、核苷酸和引物的溶液中，其中的引物将与SARS-CoV-2病毒的目标序列互补。