backfire 啥意思？是 fire 回来了嘛？

笔记：consecutive adj. 连续的
英文释义是 following one after another in a series, without interruption，表示不断的，连续的。
It has been number one in market share for 9 consecutive years, and cups sold are enough to circle the earth 40 times. 
连续九年市场销量第一，杯子连起来可以绕地球40圈。


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