无人驾驶飞机简称“无人机”，英文缩写为“UAV”，是利用无线电遥控设备和自备的程序控制装置操纵的不载人飞机，或者由机载计算机完全地或间歇地自主地操作。
Unmanned aerial vehicles, also known as “drones” or “UAVs” in English, are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by onboard computers.
人民币现金是国家法定货币，是最基础、最根本的支付工具。人民币的单位为元，辅币单位为角、分。1元等于10角，1角等于10分。人民币符号为“元”的拼音首字母Y加上两横，即“¥”。中国人民银行负责人民币的设计、印制和发行。
RMB cash is the national legal tender and the most basic and fundamental means of payment. The unit of RMB is yuan, and the subsidiary units are jiao and fen. 1 yuan is equal to 10 jiao, and 1 jiao is equal to 10 fen. The RMB symbol is the pinyin initials Y of “yuan” plus two horizontal lines, that is, “¥”. The People’s Bank of China is responsible for the design, printing and issuance of RMB.