佩提特金与史坎纳皮科正合作探讨类星体光谱中观测到的重元素群集现象。
Petitjean and Scannapieco are working together on the clustering of heavy elements observed in quasar spectra.
通过火灾时人的群集现象引伸出家庭行为，并着重从社会学、心理学的角度阐释了火灾时的家庭行为。
It explicated family behaviour in fire through human crowd behaviour and explained the family behaviour in the point of sociological and psychological views.
通过火灾时人的群集现象引伸出家庭行为，并着重从社会学、心理学的角度阐释了火灾时的家庭行为。
It explicated family behaviour in fire through human crowd behaviour and explained the family behaviour in the point of sociological and psychological views.
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