本集重點教學：
ransomware 勒索軟體
contend with sth. = deal with or overcome problems or difficulties 須面對、處理不愉快的事，後面通常接困難棘手的狀況
disclose 揭發，公開
cyber 與網路相關的
manage to 設法 = try hard to do something difficult
encrypt 加密
decrypt 解鎖，破解
demand 要求
bitcoin 比特幣
facilitate 促進
