It hinges on information flowing in two directions, both from the diagram to your eye, but also back from your brain through the mouse pointer to the live diagram.
它取决于两个方向流入的信息，既从图表进入您的眼睛，也通过鼠标指针从您的大脑到达实况图。
So far the examples have picked objects using the default shape: an imaginary ray going from the viewer's eye position through the mouse pointer into infinity.
目前为止的例子都是使用缺省形状拣选对象：可以假想是一根从观察者眼睛的位置经过鼠标点至无穷远处的射线。
The lion opened one eye and saw the little mouse.
狮子睁开了一只眼睛，然后看见了这只小老鼠。
Their eye movement is captured by digital cameras fixed to the glasses, enabling the eyes to act like a computer mouse.
固定在眼镜上的数码像机能够捕捉用户的眼球运动，这样一来双眼就可以代替电脑鼠标的功能。
A young mouse lemur gets its daily sustenance from an eye - dropper.
一只年幼的倭狐猴从滴管里吸食它的食物。
One of the important applications is used for eye-controlled mouse.
其中一个重要应用就是用作眼控鼠标。
A young mouse lemur gets its daily sustenance from an eye-dropper.
一只幼年的小嘴狐猴从眼滴管中吃着它每天的食物。
A young mouse lemur gets its daily sustenance from an eye-dropper.
一只幼年的小嘴狐猴从眼滴管中吃着它每天的食物。
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