这种结合不对称、解剖学和偶然性的进化论机制并未提供一种充分的解释，以说明蜗牛的右旋何以会成为主要的旋向。
This evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.
水轮机旋向为俯视顺时针。
The turning direction of this water turbine is overlook clockwise.
本文详细研究了不同旋向楔横轧成形螺旋面在不同坐标下的方程。
The equations of different helix in cross wedge rolling in different coordinates were studied in this paper.
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