朗朗读书声用英语表达是：the sound of reading aloud；

sound：n. 声音; 响声; 声; 声响; 音响。

reading ：v. 识字; 阅读; 读懂; 读; 朗读; 读到; 查阅到。

In the classroom, you will hear the sound of reading aloud;

教室里，传来我们琅琅读书声；

The classroom is full of the sound of reading.

教室里充满了朗朗的读书声。

The sweet vanilla flavor was still on my tongue, the sound of her reading voice was magic to my ears.

我的舌头上还留有香草的甜味，耳中回响着她朗诵时具有魔力的声音。

But only 10 days after the earthquake, when I went there for the second time, I had before my eyes new classrooms built on debris by local villagers with planks. once again, the campus echoed with the sound of students reading aloud.

可是，时隔10天，当我第二次来到这里时，乡亲们已在废墟上搭起了板房教室，校园里又回荡着孩子们朗朗的读书声。

He's behind the rest of the class in reading.

他的阅读能力不及班上其他人。

Our son's having problems with his reading and writing.

我们儿子在读写方面有困难。