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
That's what I thought.
我也是这样想的。
Who is the auther of this short story?
谁是这短篇故事的作者？
The boat is not safe, said Ah Fang. Let's pull it out of the water.
“这船不安全，”阿芳说，“让我们把它从水里拉出来吧。”