Dead reckoning (DR) plotting can be done directly on a pilot chart or on a plotting sheet. Of the various types of navigation, dead reckoning alone is always available in some form.

推算(DR)策划可以做一名飞行员图表上直接单的时候，或者在一个策划各种类型的导航、推算独自总是可用的某种形式。

youdao

Same distance, same eye chart, the only difference being they're sitting in a flight simulator and they were wearing pilot overalls.

相同的距离，相同的视力表，唯一的不同是，他们坐在,飞行模拟器里，穿着飞行服。

哈佛公开课 - 幸福课课程节选

And then she took the exact same people-- this time, put them in a pilot overalls and at the same time put them in a flight simulator and showed them the exact same the eye chart.

然后她把让同一群人-,这次让他们穿上飞行服,同时让他们坐进飞行模拟器,然后给他们看完全相同的视力表。

哈佛公开课 - 幸福课课程节选