Trace precedents
[计] 追踪引用单元
🧩 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
precedents
[p'resɪdənts]
n. 引用单元;范例( precedent的名词复数 );先前出现的事例;前例;先例;
🗣️ 情景例句
If you have something you want to talk about,
假如你有什么事情要谈，
To hover
盘旋
Among these I would list string and brown paper, kept by thrifty people when a parcel has been opened, to save buying these two requisites.
这些东西中我想举出线绳和包装纸为例。节俭的人们打开包裹后便把这两样必备的东西收藏起来。省得日后去买。