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。
While some beers are vegan, others are filtered using egg whites or sea shells, according to barnivore, a vegan beer and wine guide.
根据纯素啤酒白酒指南公司barnivore公司，虽然一些啤酒是纯素的，但是，其他一些啤酒是使用蛋白或者海贝制品来过滤的。
Sometimes I will alsopick up some sea shells or feel the sea wind.
有时候我也会捡一些海鲜贝壳，或者吹吹海风。
Sometimes I will also pick up some sea shells or feel the sea wind.
有时我也会拿起一些海贝壳或感受海风。
Sometimes I will also pick up some sea shells or feel the sea wind.
有时候我也会捡一些海鲜贝壳，或者吹吹海风。
Sea shells have been used as money at some time or another over the greater part of the Old World.
海贝在欧洲大部分地区曾经不断地被当做货币使用。
Some of us keepers and breeders will be thinking that we have no problems because our birds have access to cuttlebone or they get oyster shell grit or crushed egg shells or chicken bones.
我们中的一些人员和育种会认为我们没有问题，因为我们只获得海螵蛸或他们得到牡蛎壳砂砾或压碎蛋壳或鸡骨头。
Sometimes I will also pick up some sea shells or feel the sea wind. It must be amusing.
有时候我也会捡一些海鲜贝壳，或者吹吹海风。肯定很有趣。
Sometimes I will also pick up some sea shells or feel the sea wind. It must be amusing.
有时候我也会捡一些海鲜贝壳，或者吹吹海风。肯定很有趣。
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