筏状木框

例句：

1. 1. The boat was builtwith a wooden raft as its mainstructure.
   这艘船是用一根木筏作为主要结构建造的。
2. 2. The engineer designed thenew bridge using a steel frame.
   工程师用钢框架设计了这座新桥。
3. 3. Thescientist used a sophisticated framework to analyze thedata.
   科学家使用一个复杂的框架来分析数据。