Each letter has two sizes.Generally speaking, every letter makes a sound. e.g. the letter B makes a [b] sound in the word book.是什么意思_Each letter has two sizes.Generally speaking, every letter makes a sound. e.g. the letter B makes a [b] sound in the word book.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句