“低沉的声音”可以翻译为 "a deep voice" 或 "a low-pitched voice"。
"a deep voice" 是较为常用的表达，强调声音的厚重和低沉感。
"a low-pitched voice" 则更侧重于描述声音的音调较低。
在实际使用中，两者可以互换，具体选择取决于语境和个人偏好。例如：
He spoke in a deep voice, which made him sound very authoritative.（他用低沉的声音说话，显得很有权威。）
The actor had a low-pitched voice that added depth to his character.（这位演员声音低沉，为他的角色增添了深度。）