婴儿开始发出第一个单词时，父母总是很兴奋。

Parents get excited when their baby starts ___uttering the first words.

她犹豫了一会儿，才说出了真相。

She hesitated before ___uttering the truth.

宝宝开始发出咿咿呀呀的声音。

The baby is ___uttering soft babbling sounds.