a change in the style, loudness, etc. of something such as your voice in order to achieve an effect or express an emotion

The Minister has evidently practised the modulation of her voice. 部长显然已经练习过对她自己声音的调节。

The actors sit on stools and present the script and character through intonation and other voice modulations. 演员们坐在小凳子上，通过语调和其他对声音的调节方法来呈现剧本和角色。

a small change that happens in response to something or is intended to achieve an effect

A surreal, nightmarish atmosphere is created in the film by constant modulations of colouring of the light. 通过对光线色彩的不断调整变化，在影片中营造出一种超现实的、梦魇般的气氛。

His performance is exceptional in its intensity and subtle modulation. 他的表演在强度和细节调整方面都异常出色。

the ability to control, influence or change a particular physical process

This area of the brain is involved in the modulation of emotional behaviour. 大脑的这一区域参与对感情行为的调整。

The proteinase inhibitor function has been associated with modulation of cell growth. 蛋白酶抑制剂的功能与细胞生长的调整有相关性。

a change from one musical key to another

the composer's use of modulation 作曲家对变调的运用

It is best to write what sounds smooth and natural, so we should forget about modulations to far-distant keys (e. g. C to F). 最好写些听起来流畅自然的乐曲，所以不要使用两个差异很大的调门之间的转调（譬如从C调转到F调）。

the process of changing the amplitude or frequency of an electrical signal by mixing it with another signal, or a signal that has been changed like this

With traditional radar, the modulation and frequency of the signal can be fine-tuned to produce the easiest-to-read echo. 使用传统雷达，可以对信号的调制和频率进行微调，以产生最容易读取的回波。