Trace element
[化] 痕量元素
📖 牛津释义
trace element
substance occurring or needed only in extremely small amounts (esp in the soil, for the proper growth of plants) 微量元素, 痕量元素（尤指土壤中的, 植物正常生长所需要的）.
🏥 医学释义
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
element
['ɛləmənt]
n. [化]元素;要素;原理;[电]电阻丝;
🗣️ 情景例句
and his interview was very successful.
他的面谈很成功。
Old oxen have stiff horns.
牛老角硬。
he identifies himself with its centre of gravity, its mass, its weight;
他把自身和物体重心、质量、重量融为一体。