1. Cyclometry is the branch of mathematics that deals with the measurement of circular arcs and their properties.
(在数学中,圆周计算是处理圆弧测量及其性质的一个分支。)
2. The ancient mathematicians made significant advances in the field of cyclometry, developing formulas for calculating the circumference of circles.
(古代数学家在圆周计算领域取得了重大进展,发展出了计算圆周长的公式。)