VOA慢速英语:2019年美国工业机器人出货量下降

shipment –n. a load of goods that are being sent to a customer, store, etc.

unit –n. a single thing, person, or group that is a part of something larger

conveyor belt –n. a mechanical apparatus for moving articles or bulk material from place to place

automate –v. to run or operate something, such as a factory or system, by using machines, computers, etc., instead of people to do the work

assembly line –n. an arrangement for assembling a product mechanically in which work passes from one operation to the next in a direct line until the product is finished