The trial was conducted at the company's Airbreathing Test Facility in Orange County, Virginia, and involved a full-scale engine tested at conditions simulating high-altitude, high-speed flight.
Remember three months ago, Zizhu spent just six point three cm, I in order to measure the altitude of the bamboo, I have to put on a bamboo stem, and draw scale.
记得三个月前,紫竹花刚六点三厘米,我为了测量紫竹花的高度,我特意插上一根竹干,并在上划上刻度。
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The puzzle is that these lines and figures are of such a scale that they can only be recognized from a high altitude.