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- 图形记录便显示了在短的间隙内先后到达的三种波。
The graphic record shows three waves arriving one after the other at short intervals.
- 临近终点时，那几匹马齐头并进，简直分不出先后。
As the horses raced towards the finishing post, there was nothing in it.
- 我们将按照历史上的先后顺序研究这些事件。
We will deal with events in historical sequence.
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