Warning: file_put_contents(): Only 0 of 6136 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/totle.com.cn/index.php on line 55 tree line英英字典_tree line剑桥英语解释_tree line柯林斯英文解释_乐豆毛深蓝词典
1. N 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