lǎo / shī / tí / xǐng / dà / jiā / yào / jìng / xī / zì / zhǐ / bù / yào / suí / yì / diū / qì / shū / běn

老师提醒大家要敬惜字纸，不要随意丢弃书本。

The teacher reminded everyone to cherish written materials and not discard books carelessly.