ALLW今天的价格报28.79。 ALLW的盘前价格是多少？ ALLW的最新盘前价格是28.69。 ALLW的盘后价格是多少？ ALLW的最新盘后价格是28.84。 ALLW的市盈率是多少？ ALLW的市盈率是17.05。 ALLW是什么？ ALLW是SPDR State Street Investment Management发行的ETF，在纳斯达克股票交易所上市交易。

“Sawfly（锯蜂）” 是一种与黄蜂相似的昆虫，这种昆虫会切开植物并把自己的卵产在切口处。苏格兰赫瑞-瓦特大学的研究人员一直在研究雌性锯蜂怎么知道如何做出这种独特的切割，从而避免杀死或损伤植物。

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