向陀螺性的；旋转回归线的英文

gyrotropic

• 向:    direction
• 陀螺:    top; whipping top; ...
• 性:    nature; character; ...
• 的:    4次方是 The fourth po ...
• 旋转:    revolve; gyrate; r ...
• 回归线:    tropic; regression ...