deaf and dumb alphabet

例句：

1. 1. The deaf and dumb alphabet is a popular toolfor teaching basic reading skills to children withhearing impairments.
   聋哑字母表是教授有听力障碍的儿童基本阅读技能的流行工具。
2. 2. In the deaf anddumb alphabet, each letter represents a soundthat can be heard by those who aredeaf or have hearing loss.
   在聋哑字母表中，每个字母代表一个声音，这些声音对于聋人和有听力损失的人来说是可以听见的。
3. 3. The deafand dumb alphabet was developed to help peoplecommunicate effectively despite their hearing difficulties.
   聋哑字母表是为了帮助人们即使在听力困难的情况下也能有效地交流而开发的。