基轨迹	可供发布的匿名轨迹数据集
$l o c_{1} \to l o c_{2} \to l o c_{3}$	$l o c_{1} \to l o c_{2} \to l o c_{3}$
	$l o c_{1}^{d_{1}} \to l o c_{2}^{d_{1}} \to l o c_{3}^{d_{1}}$
	$l o c_{1}^{d_{2}} \to l o c_{2}^{d_{2}} \to l o c_{3}^{d_{2}}$