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
Well, I almost had a heart attack a few moments ago.
好啦，我几乎要得心脏病了。
You are bigger than I am.
你比我大
Thank you. Goodbye.
谢谢。再见。