1.We may determine the height of a mountain by trigonometry.
我三角原理测定山高度。
2.If you want to be a draftsman, a machinist, a molder, or a patternmaker, you'll need algebra and geometry and even trigonometry.
如果你想成手艺人、缝纫、造型或制模,你需要代数和几何,甚至三角学。
3.In a week, arrive from long triangle bead trigonometry, go to Beijing again, many China's famous entrepreneur expresses to assentation to Ma Yun's appeal.