调查人员在旧档案中寻找失踪船只最后留下的踪迹。Diàochá rényuán zài jiù dàng'àn zhōng xúnzhǎo shīzōng chuánzhī zuìhòu liúxià de zōngjì.Investigators searched old archives for the last traces left by the missing vessel.
雪地上的踪迹表明,昨天有人来过这里。Xuědì shàng de zōngjì biǎomíng, zuótiān yǒu rén láiguo zhèlǐ.The tracks in the snow show that someone was here yesterday.
搜救队在山谷里搜了三天,还是没有找到失踪者的踪迹。Sōujiù duì zài shāngǔ lǐ sōu le sān tiān, háishì méiyǒu zhǎodào shīzōngzhě de zōngjì.The rescue team searched the valley for three days but still found no trace of the missing person.