Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
app – n. a program for a smartphone or other device that performs a special function
transaction – n. an occurrence in which goods, services, or money are passed from one person or account to another
access – n. the right or opportunity to use or see something
proprietary – adj. owned or controlled by a company
excuse – n. a reason someone gives for why they did something wrong
remedy – n. something that helps solve a problem
review – v. to consider something in order to decide if changes should be made
