＜名詞trace＞
There was no trace of blood [the disease].
：
disappear[vanish] without (a) trace
：
a（faint）trace of a Japanese accent
：
smile with a trace of pride
：
"I don't know," he said,with no trace of a smile.
：
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize
