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
It's about the size of the United States, but it has a population of only 16.5 million.
它和美国一般大，但人口却只有一千六百五十万。
Forget it!
算了！
No matter how much we like honey, or how much we have read about the uncanny sense of direction which bees possess, we have a horror of being stung.
不管我们多么爱吃蜂蜜，或读过多少关于蜜蜂具有神秘的识别方向的灵感的书，我们仍然十分害怕被蜂蜇。