1. 低调的：low-numbered 号码少的 | low-pitched 低调的 | low-pressure 低压的

2. 倾斜缓的：low-numbered 号码少的 | low-pitched 倾斜缓的 | low-pitched 低调的

3. low-pitched的解释

3. 音调很低的：valve cusps 瓣尖 3 | low pitched 音调很低的 3 | lachrymal gland 泪腺 3

1. （声音）低沉的，沉闷的
    A sound that is low-pitched is deep.

    e.g. With a low-pitched rumbling noise, the propeller began to rotate.
           伴随着隆隆的低沉噪声，螺旋桨开始旋转起来。

2. （嗓音）轻柔的，轻细的
    A voice that is low-pitched is very soft and quiet.

    e.g. He kept his voice low-pitched in case someone was listening.
           他把声音放低以防被人听见。

1. used of sounds and voices
    low in pitch or frequency

    Synonym: low

2. set at a low angle or slant

    e.g. a low-pitched roof