Traces of
微量的…,…的痕蹟
🧩 词语组成解析
n. 痕迹；遗迹（trace的复数）
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答应提前一个月交货，我们就同意开信用证。
Until when?
借到什么时候？
Sure that I had passed, I was almost beginning to enjoy my test.
确信我已通过考试，所以我几乎开始喜欢起这次考试。