Chemicals from our phone and TV screens are accumulating in the brains of endangered dolphins and porpoises. New research shows these "liquid crystal monomers" from e-waste can cross the blood-brain barrier and may disrupt DNA repair, highlighting the growing impact of electronics on marine life.

· · 来源:tutorial资讯

The Recency GradientNewer models tend to pick newer tools. Within-ecosystem percentages shown. Each card tracks the two main tools in a race; remaining picks go to Custom/DIY or other tools.

但广告化并不天然等于价值创造。当所有商户都必须通过竞价才能被看到时,广告费便从增量工具演化为入场券。单个商户的理性选择,是继续加价以维持原有订单量;但从整体看,供给侧为此付出的总成本却在不断上升,而需求并未同步扩大。平台收入提高,但供给侧整体并未获得更多有效需求,反而陷入内耗式竞价。这种结构下,广告化更像是将抽佣换了一种更隐蔽的形态,甚至加剧了零和博弈。

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Фото: Stringer / Reuters