Trace elements
[医] 微量元素
🧩 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
n. 原理, 基础
🗣️ 情景例句
Looking at the houses.
看房子。
Ack! Snake!
哗！是蛇！
I was wondering if you were doing anything this weekend.
我想知道这个周末你有什么要做。