tree-line林木线
quad tree hidden line algorithm四叉树隐线算法
tree-line of Luya Mountain芦芽山林线
lower tree line森林下限
pine-tree line松树线
Tree Line Films制作公司
Towards The Tree Line对树线
arctic tree line[林] 北极树木线;着名的极地树线
N（名词） the zone, at high altitudes or high latitudes, beyond which no trees grow. Trees growing between the timberline and the tree line are typically stunted 林木线; 指高海拔或高纬度地区树木生长的上限