按此思路，还可进一步扩展轨迹种类，并实现其组合。

According to this, may expend the trajectories type, and realize the combination.

youdao

按此思路，还可进一步扩展轨迹种类，并实现其组合。

According to this, may expend the trajectories type, and realize the combination.

youdao