We’re able to perceive depth by using both binocular and monocular visual cues.

我们通和单两种觉暗示，来观察深度。

Fred as you know is monocular. Who's gonna throw him his ping pong ball?

但弗雷德是一只眼 谁来给它抛？

For that we look to our monocular cues to help us determine the scale and distance of

需要单觉暗示来确定物品的大小和距离。