trace [treɪs]

以下由轻松背单词网站提供

n.痕迹，踪迹，微量；vt.追踪，找出根源，描绘；vi.追踪

to find someone or something that was lost

There isn't a trace of a smile on her face. 她脸上没有一丝笑容。
We have lost all trace of him. 我们找不到他的踪迹。