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
Don't worry. You'll get used to it in no time.
别担心，你会很快习惯的。
I'm twenty-one years old.
我21岁。
On another occasion, he invited a number of important critics to see his private collection of modern paintings.
还有一次，他邀请一些著名评论家来参观他私人收藏的现代画。