Dogs can be very different in size, shape and colour.

狗狗们的大小、体型和颜色有很大不同。

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After one month since borning they can be different in the tail shape.

出生后一个月后，便可以判断出尾部的形态优劣。

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After one month since borning they can be different in the tail shape.

出生后一个月后，便可以判断出尾部的形态优劣。

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