在特定的物种中旋转的方向是恒定的,例如旋花科植物总是逆时针方向旋转。
The direction of rotation is often constant in a species; for example, Convolvulus always rotates in an anticlockwise direction.
番薯属是开花植物旋花科中最大的属。
Ipomoea is the largest genus in the flowering plant family Convolvulaceae.
番薯属是开花植物旋花科中最大的属。
Ipomoea is the largest genus in the flowering plant family Convolvulaceae.
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