soft mattress的用法和樣例：
例句
- The whole process of breakwater riprapping construction was monitored by the prototype monitoring device buried in the sand soft nappe.
摘要通過埋設在砂肋軟體排上的原形觀測儀器，對防浪圍堤拋石施工過程進行了全程監測。 - It introduces the application and construction method of various kinds of soft mattresses in the Yangtze Estuary Deepwater Channel Regulation Project.
介紹各種軟體排在長江口深水航道治理工程中的應用及施工方法。
