When Philodina is at the same position with no body-bending, there is no significant difference between two front vortices generated from the corona cilia.

• 当旋轮虫于原地摆动且纤毛做顺时针的转向时，左前方之涡漩的大小及强度皆大于右前方之涡漩，反之亦然。