Definition: proof that someone or something was in a place Level: B2
警方找不到越狱囚犯的任何踪迹。
The police could not find any ___trace of the escaped prisoner.
那个古代文明消失得无影无踪。
The ancient civilization vanished without a ___trace.
探险家们在那个星球上没有发现生命的迹象。
Explorers discovered no ___traces of life on the planet.
