For instance, it's still not known why only some chiton species have eyes, or how the creatures are able to use the same material to make both their eyes and their shells.

例如，为什么只有一些特定种类的石鳖才有眼睛，还有它们是如何用同一种物质构建眼睛和甲壳的。

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Thus, they use the same material as standard crystal silicone panel manufacturers, with two major exceptions.

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You can also use the same app to prepare tracks for more advanced DJ techniques, meaning -- as the marketing material will have you believe -- you can sketch out a set while skateboarding through your hood, before rolling up and rocking the party.

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