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
→ see also roller coaster
The table mats and coasters have a non-slip, soft green backing.
这些桌垫和杯垫下都有一层绿色防滑软衬。
Why do we like roller coasters?
为什么我们喜欢过山车?
Think of theme parks and you think of roller coasters.
一提到主题乐园,你马上想到的云霄飞车。
Some people who visit the Mall of America have other things on their mind besides sharks,shopping, eating and roller coasters.
VOA: special.2010.08.13
So don't listen to what people say about United States' East Coasters. That's not true.
所以不要听人说美国东海岸的人怎样,那并不是事实。
It has more than twenty-five rides including several roller coasters.
VOA: special.2010.08.13
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