Shrinkwraps
n. 收缩包装；收缩包裹
🗣️ 情景例句
She called to say the plane was delayed.
她打电话回来， 告诉我们飞机误点。
What is he doing?
他做什么事？
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）