The elongated, serpentine body that allows land snakes to slither through dense grass also serves aquatic snakes in propelling through the water.

这种细长蜿蜒的身体能让陆地上的蛇在茂密的草丛中爬行，也能让水蛇在水中游动。

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Dicephalus is common in reptiles and particularly in British grass snakes, who lay their eggs inside compost heaps where decomposing matter produces heat.

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。

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The elongated, serpentine body that allows land snakes to slither through dense grass also serves aquatic snakes in propelling through water.

伸长的、蜿蜒的躯体可以使得陆生蛇类在浓密的草丛间滑动，也能使水生蛇类在水里游动自如。

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And we're carrying out an intensive amount of research to find better methods than PSA to distinguish between the minority of cases that are life threatening and do need treatment - the vipers - from the majority of cases that don't - the grass snakes.

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