[uncountable] paper, plastic or other material that is used for wrapping things in
包装材料◆a box covered with plastic wrap
用塑料膜包装的盒子 ●under ˈwraps (informal) being kept secret until some time in the future
保密；隐藏◆The development of the new machine was kept under wraps.
新机器的开发处於保密状态。 bubble wrap gift wrap shrink-wrap