How can Amazon deliver your toothpaste with a drone if it has to stay within eyeshot of a pilot?

如果无人机不能飞入飞员视线之内，亚马逊还如何用无人机配送你牙膏？

Like he was there, just out of eyeshot or something.

好像他就在这里 只不看不见。

And though it was merely crossing his line of march, he judged it wiser to get out of eyeshot as speedily as he could.

虽然它只是越他路线， 但他认为还是尽快离开视线范围为明智之举。

A study by the University of Texas has suggested that just having a smartphone within eyeshot can reduce productivity, slow down response speed and reduce grades, as the eyes of the students keep being drawn away from their work.

德克萨斯大学一项研究表明， 仅仅将智能手机放在视线范围内会降低工作效率， 降低响应速度并降低成绩，因为学生眼睛不断从他工作上移开。