八、蛋白質都是由20種不同的L型α胺基酸連接形成的多聚體，蛋白質結構是指蛋白質分子的空間結構，共可為四級。請敘述此四級結構的不同處。(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)