VOA慢速英语:新型无电池手机将通过无线电信号供电

prototype – n. original or first model of something from which others are developed or made

ambient – adj. existing in the surrounding area

convert – v. change from one thing into another

leap – n. sudden change or improvement in something

microphone – n. device people speak into that records sounds

vibration – n. continuous shaking movement

button – n. small part of a machine or device that is pushed to make it work

solar – adj. of or related to the sun