pi
复数形式
pis
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pi, 蛋白酶抑制剂
an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
同义词：
2
pi, 希腊字母表的第十六个字母
the 16th letter of the Greek alphabet
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首席研究员, 负责的科学家
the scientist in charge of an experiment or research project
4
π, 圆周率
a mathematical constant representing the ratio of a circle's circumference to its diameter, approximately equal to 3.14159
- Trigonometric functions involving angles in radians often yield results containing multiples of pi.
涉及弧度角的三角函数通常会产生包含π倍数的结果。
- Sine and cosine waves are periodic functions with periods that are multiples of 2π, a property tied to the circle and pi.
正弦波和余弦波是周期函数，其周期是2π的倍数，这一性质与圆和π有关。
- The Riemann zeta function involves pi in its value at even integers, such as ζ(2)= π²/6.
黎曼ζ函数在偶数整数的值中涉及pi，例如ζ(2) = π²/6。
- In geometry, the area of a sector of a circle is determined by the formula A = 0.5 r² θ, where θ is the angle in radians, often involving pi.
在几何学中，圆的扇形面积由公式 A = 0.5 * r² * θ 确定，其中 θ 是以弧度为单位的角度，通常涉及 π。
- The circumference of a semicircle is C = π * r, showcasing the presence of pi in geometric calculations.
半圆的周长是 C = π * r，展示了 π 在几何计算中的存在。