Ultra trace
[化] 超痕量
🧩 词语组成解析
ultra
[['ʌltrə]]
a. 过分的, 极端的\\nn. 极端主义者, 过激论者, 急进论者
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
Otherwise, they'll not be considered.
否则不予受理。
An empty purse frightens many friends.
曩中无分文，亲友不上门。
In the evenings he studied hard for his exams, and most mornings he took tourists around Oxford.
他晚间努力学习，以应付考试，而大多数早上，他则带领游客在牛津大学参观。