The circles can take the shape of dna structures , scorpions , snowflakes , helices , webs , knots and complex geometric patterns .
怪圈的形状采用dna的结构，蝎子，雪花，螺旋，网结和复杂的几何图形。
Temperature oscillations or chemical changes should cause complete double helices to come apart , each then rebuilding the whole as fresh nucleotides link on .
温度和化学变化会使双股链分解，然后各核苷酸再重新形成整体继续连接。
But just as the demise of the peculiarly english rural tradition was predicted , the circles - which can take the shape of dna structures , scorpions , snowflakes , helices , webs , knots and complex geometric patterns - have abruptly returned in force .
