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
Yes, I am. I'd like some wine and roast duck.
是的。我想要些酒和烤鸭。
Why did you get home so late?
为什么你这么晚回家？
Babies of two months old do not appear to be reluctant to enter the water.
两个月的婴儿并未显得不愿意入水。