VOA慢速英语:美国邮政局测试自驾卡车运输邮件

round trip – n. a trip to one or more places and back again

initiative – n. plan or activity that is done to solve a problem or improve a situation

interstate – n. a fast wide road that stretch between states and connects important cities in the United States

efficient – adj. working well and not wasting time or energy

beyond - adv. in addition; adj. - at a greater distance than

multiple – adj. of or including more than one; many

advantage – n. something good about a situation that can help a person succeed