All had been evaluated using a slower but highly accurate test called real-time reverse transcription-polymerase chain reaction, or rRT-PCR, which checks for the genetic material of the virus.
应用一种缓慢但高度准确的试验，检测病毒的基因物质，叫即时逆转录-聚合酶链反应，或是rRT - P CR，全部做了评价。
2
Lack of preparation can cause test anxiety or make it worse, but for many people test anxiety occurs regardless of preparation or knowledge of the material.