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
If you can meet our needs- to order 200 sets, we'll give you trade discount.
如果你能答应我方的要求--定200台，我们同意给你折扣。
Experience keeps no school, she teaches her pupils singly.
亲身经验，才是经验。
He can't make it today. He has to stay at home.
他今天不行了。他得呆在家里。