She lifted up her voice at an angle calculated for distance and shouted, "Y-o-u-u TOM!"
她在一角提高声音朝远处高声喊道:“喂——喂——喂,汤姆!”
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self y Notice what I also do here, I create self dot y, give it a value, and then, oh cool, I can also set up what's the radius and angle for this point, by just doing a little bit of work.
As the aircraft comes closer the Yangle increases more rapidly and just as the aircraft reaches an Y of 90 degrees (exactly overhead), it makes a sharp turn due south.