Rich visual feedback is the key to successful direct manipulation.
丰富的视觉交互是直接操作成功的关键。
As discussed, the key to successful direct manipulation is rich visual feedback.
我们讨论过，成功的直接操作的关键是丰富的视觉反馈。
To provide rich visual feedback, the entry field could change colors to reflect its estimate of the validity of the entered data.
为了提供丰富的视觉反馈，可以改变输入字段的颜色来反映对输入数据有效性的判断。
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