lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / dà / wèi / yíng / hé / yuē / de / qiān / shǔ / bèi / jǐng

历史课上，老师介绍了大卫营和约的签署背景。

In history class, the teacher introduced the background to the signing of the Camp David Accords.