2. Different sources: both the sound of books and the sound of books are used to describe the clear and loud sound of reading, but the sound of books is more popular and the sound of books is more literal. In addition, the sources are different. The sound of the book comes from Ji Yun's Notes on Yuewei Caotang in Qing Dynasty, and the sound of the book comes from Li Ruzhen in Qing Dynasty.
3. Different emphasis: In modern Chinese, people tend to use "the sound of books is bright and clear". Lang is a pictophonetic character, which originally meant to be bright and extended to a clear and loud voice. Lang Lang is an adjective with two related meanings: one means bright and full of light, and the other means clear and loud sound, which is also a pictophonetic character. The original meaning is Lang, that is, beautiful jade or stone shaped like beads.
4. "Langshu clear voice" is a vivid way of expression, which describes the sound of reading, conveys a positive learning atmosphere and a clear way of communication, and is particularly pleasant and inspiring both in the educational environment and in personal reading time.