失传[shī chuán]
失传
fail to be handed down from past generations; be lost:
例：一种失传的艺术
a lost art;
这种技艺已在世上失传。
The art was lost to the world.
我国有些古代科学著作已经失传。
Some scientific books of ancient China have been lost.
1. be lost：be lost失传 | bibliographer 目录学家 | bibliographic center 书目中心
2. sitthuan：sitte 實地 | sitthuan 失傳 | sittian 失電