Sharks, it seems, are completely colour blind.
他们，似乎全部都是 色盲 。
Sharks may be able to smell blood from miles away, but they probably don't know how red it is: New research suggests sharks are color-blind.
鲨鱼可以在数英里外就嗅到鲜血的腥味，但是他们很可能并不知道血是红的：最新研究表明，鲨鱼其实是色盲。
It makes sense that sharks might be color-blind, the study team noted.
研究团队指出，鲨鱼可能是色盲，其实是有道理的。
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