... occupier 占用人 occurrence index 火灾发生率 occurrence of spark 火花的产生 ...
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lightning fire occurrence index 雷击发生率
·2,447,543篇论文数据，部分数据来源于NoteExpress
One buy signal: Transportation stocks are rising in tandem with the blue-chip index, an occurrence that many investors view as a harbinger of more gains.
WSJ: As Confetti Settles, Strategists Wonder: Will Dow's Rally Last?
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