Trace constituent
[化] 痕量成分
🧩 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
What floor is the shoe department on?
鞋部在几层？
Would you ming calling her sometime?
你可以找个时间打电话给她吗？
It's just our policy.
这只是公司的政策。