失传

běi qǔ de qǔ pǔ zǎo yǐ shī chuán

北曲的曲谱早已失传。

The collection of tunes of beiqu has long fallen into oblivion.

shī chuán yào fāng

失传药方

lost prescription

zhè zhǒng jì yì yǐ zài shì shàng shī chuán le

这种技艺已在世上失传了。

The art was lost to the world.

zhè mén shǒu yì yǐ jīng bīn lín shī chuán le

这门手艺已经濒临失传了。

This craft is on the verge of extinction.