Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
layoff –v. ending employment for workers while there is no work for them to do
altitude –n. the height of something (such as an airplane) above the level of the sea
supply chain –n. a network of companies that make parts or provide services for a complex manufactured product
priority –n. the most important thing
timeframe –n. a period of time that is used or planned for a project
region –n. an area of a state, country or the world that is different from others for a reason
