As he turned back the clock, the dust disk collapsed into a dense, bright ring.
模型显示，随着时光倒流，尘埃盘收缩成一个致密的明亮圆环。
Water and food can be put in a clearance between the damping bedstead and the antiseismic ring for eating when people are trapped in a collapsed building.
减震床架和抗震圈的空隙中还可放置一些水和食品，以备困在倒塌的楼房里时食用。
The horses collapsed in the parade ring before the first race.
在第一轮比赛开始之前，这两匹马站在马群中突然倒地。
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