It also focuses on the two key elements which influenced the emergence of the classic Hollywood studio system: the advent of sound and the business ideal of vertical integration.

它还关注了经典好莱坞工作室系统出现的两个关键影响因素：声音的出现和纵向一体化的商业理念。

youdao

On the other hand, many think it's the basic physical properties of sound that hold the key to perceiving sounds as appealing or jarring.

另一方面，许多人认为声音的基本的物理属性，是决定听者感知为和谐或不和谐的关键。

youdao

Understanding the mechanism is the key to making a sound selection.

理解该机制是做出合理选择的关键。

youdao

This lends a fresh, exotic subtlety to the bright major-key sound.

WSJ: Making Music Against the Odds | Ensembles of Afghanistan National Institute of Music

It's a major-key sound, but unlike our major keys, which have a half step between the third and fourth tones, the Lydian scale has a whole step there, and the half step between steps four and five.

WSJ: Making Music Against the Odds | Ensembles of Afghanistan National Institute of Music

Therefore, forecasting future earnings growth, bought at sound valuations, is the key to safe, sound and profitable performance.

FORBES: Looking to the Future