The head of the line catches the tail, and the chain spins into a vortex.
该捕食链的头捕捉尾巴，链到一个漩涡旋转。
2
In the experiment, a simplified aircraft model (with tail wing) is employed to construct a 4-vortex wake system consisting of a pair of tip vortices and a pair of counter rotating tail plane vortices.