Treelines
(treeline 的复数) n. 树木生长线（按海拔标示的树木生长上限）
🗣️ 情景例句
Come and sit down for a minute, Michelle.
过来坐一会儿， Michelle。
Grasp the nettle and it won't sting you.
困难像弹簧，你硬它就软。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。