如今，一个郊区后院，正像它可能带有一个机农场一样，很可能带着一个堆肥堆子。
Today, a compost pile is just as likely to be associated with a suburban backyard as it is with an organic farm.
双头畸胎在爬行动物中很常见，尤其是英国草蛇，这种蛇把卵产在堆肥堆里，肥料里面正在腐烂的物质产生热量。
Dicephalus is common in reptiles and particularly in British grass snakes, who lay their eggs inside compost heaps where decomposing matter produces heat.
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