sinistral shell ; left coiling shell
... 歪长云闪正长岩 leeuwfonteinite 下风方向 leeward 左旋壳 left coiling shell ...
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左旋贝壳 sinistral shell
中国东部地壳左旋运动 left-rotation movemeant in eastern China
然而现在已经变为右旋占多数的蜗牛种类，其旋向性（壳的螺旋方向）一度也曾均衡分布，在某些种类中，甚至左旋曾占优势。 。
Butt at one time, handedness (twist direction of the shell) was equally distributed within some snail species that have become predominantly dextral or, in a few species, predominantly sinistral.
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