猫的呼噜声是一种令人放松的发声。

The cat's ___vocalisation of purring is very soothing.

这本词典用音标标注了单词的发音。

The dictionary uses phonetic symbols for the ___vocalisation of words.

她对公司政策的公开批评引起了广泛关注。

Her strong ___vocalisation against the company policy drew widespread attention.