VOA慢速英语:Which Apps Drain Your Phone’s Battery?

mobile - n. able to move from one place to another

battery - n. a device that is placed inside a machine (such as a clock, toy, or car) to supply it with electricity

update - n. a change or addition to computer software that includes the most recent information

percentage - n. a number or rate that is expressed as a certain number of parts of something divided into 100 parts

scroll - v. o move text or images of a Web page, document, etc., up, down, or to the side on a computer screen so that you can see all of it

function - n. the special purpose or activity for which a thing exists or is used