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
And very much in love.
而且相爱至深。
What time is the mail delivered on Saturday?
邮件在星期六什么时间被递送？
The force there assembled was trivial compared with the Danish horde.
他集结在那里的军队和丹麦大军相比是微不足道的，