Button added a key tone, increased interactivity.

按键时增加了按键音，提高了互动性。

youdao

Restaurant: design chic, warm and low-key tone, overall comfort and warmth.

设置精巧别致，色调温馨低调，整体舒适又温暖。

youdao

Bit Like: the Others, in terms of its low-key tone and supernatural spookiness.

有点像：小岛惊魂，低调的旋律，神奇的幽灵。

youdao

Sonia maintains a low-key tone when detailing her ambitions.

CNN: Handbag designer clutches to India

The F800EXR has six new filters: Pop Color, Toy Camera, Miniature, High Key, Partial color and Dynamic Tone.

ENGADGET: Fujifilm unwraps FinePix F800EXR camera with wireless sharing to Android, iOS

For one of the movie's most disturbing scenes, they produced a creeping tone in the same key as a floor buffer droning in the background.

WSJ: Trent Reznor and Atticus Ross's 'Dragon Tattoo' Score