柯林斯词典coaster /ˈkəʊstə/ (coasters) 1. N-COUNT A coaster is a small mat that you put underneath a glass or cup to protect the surface of a table. 杯垫2. →see also roller coaster 返回 coaster剑桥词典 coaster noun [C] (OBJECT) a small piece of wood , plastic , or other material that you put a glass or cup on to protect a surface from heat or liquid 杯垫 coaster noun [C] (BOAT) a ship that sails between ports along a coast （航行于沿海港口间的）船只 返回 coaster