二、請問polymerase chain reaction(PCR)實驗技術是依據哪一種分子生物原理設計而成？PCR 實驗目的為何？PCR實驗包括哪幾項基本步驟？(10分)

20. Technology seems to be advancing daily, but the Pilot by Waverly Labs, the world’s first translation earpiece, might be a truly huge step forward for communication. The earpiece has microphones to isolate the speaker’s voice, sent to the app. The app runs speech recognition, translation and speech synthesis processes before sending the new speech to the listener’s earpiece. (8分)