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
Ten o'clock,
十点钟，
I hope you can pass the examinations.
我希望你的考试能通过。
The hunt went on for several weeks, but the puma was not caught.
搜寻工作进行了好几个星期，但始终未能逮住那只美洲狮。