Boundary trace
[计] 边界道
🧩 词语组成解析
trace
[tres]
vt. 跟踪，追踪;追溯，探索;探索;查找;
vi. 沿着一小径或道路前进;可以追溯的;
n. 痕迹，踪迹;微量，极少量;[植]（脉）迹;痕迹;
trace(draw)→回溯
🗣️ 情景例句
We should thank you.
我们应当感谢你。
As the old cock crows, so doth the young.
有其父必有其子。
They were climbing up the wall of the house and then on to the leaves of the tree.
它们正在顺着房子的外墙往上爬，然后爬上树叶。