警方正试图追查一位在医院外被遗弃的新生儿的母亲。

The police are trying to ___trace the mother of a newborn baby found abandoned outside a hospital.

试图追踪一名被看到离开犯罪现场的男子的下落至今未果。

Attempts to ___trace the whereabouts of a man seen leaving the scene of the crime have so far been unsuccessful.

他们失踪的女儿最终被追踪到曼彻斯特。

Their missing daughter was finally ___traced to Manchester.