这些食物包括大多数的食根蔬菜(比如萝卜)，十字花科蔬菜(如卷心菜)。

These foods include most root vegetables (like carrots), and most cruciferous vegetables (like cabbage).

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教具套装在R2金鱼培训学校"的网站上零售价是30美元，包括一张长达45分钟的DVD，一本训练手册，一根鱼食棒和20多件小工具。

The kit, which retails for $30 at r2fishschool.com, comes with a 45-minute DVD, a training manual, a feeding wand and more than 20 accessories.

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上龙用四根桨状的四肢推动它庞大的身体在水里游来游去，轻而易举地就能掠食形似海豚的鱼龙。

Using four paddle-like limbs to propel its bulky body through the water, the pliosaur made easy work of passing prey such as dolphin-like ichthyosaurs.

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