It was a form of what we might today call "perception management."
它是今天被我们称作“认知管理”的一种形式。
2
The absence of color often enhances our perception of form for instance in black and white photographs.
比如在黑白摄影中，无色彩更能让我们感受到形体的存在。
3
I have focused on this concept because I've found that many people fail to grasp the ultimate flexibility of sequence diagrams, and become polarized in their perception and use of the form.