collapsible top

• 易冒落的顶板

collapsible top的用法和样例：

例句

1. A four-wheeled carriage with a collapsible top, two double seats inside opposite each other, and a box seat outside in front for the driver.
   四轮四座大马车带折叠篷的四轮马车，内有两个彼此相对的双人座位，外侧前部有供赶车人坐的包箱式座位