圈入圈出 一种光学转场技巧以一个圆将画面的外围遮住并逐渐缩小这个圆直到画面完全消失这叫圈出
Circling in and out is an optical transition technique that covers the outer edge of the picture with a circle and gradually shrinks this circle until the picture completely disappears. This is called circling out
以上为机器翻译结果，长、整句建议使用 人工翻译 。