痕迹: mark; vestige; imprint; impression; trace; trail; print 短语和例子不露痕迹 make no sign; 一种古代文明的痕迹 the vestiges of an ancient civilization. 敌军留下了仓皇退却的痕迹。 the enemy's retreat left marks of haste. 岁月
This hexagonal trace fossil paleodictyon nodosum dated tens of millions of years ago may be created by a creature that is still alive in the deep atlantic ocean 这些有数千万年的六角形痕迹化石,可能由一种现今仍然生存在大西洋海底的生物造成。