The value of
pi is approximately 3.14159.
π的值大约是3.14159。
The circumference of a circle is calculated using the formula 2πr.
圆的周长通过公式2πr计算得出。
Engineers use
pi in calculations for various applications, such as fluid dynamics.
工程师在流体动力学等应用中使用π进行计算。
Pi Day is celebrated on March 14th (3/14) every year.
每年的3月14日（3/14）是庆祝π日的日子。
The area of a circle can be found by squaring the radius and multiplying it by
pi.
圆的面积可以通过将半径平方然后乘以π来找到。
In trigonometry,
pi radians equals 180 degrees.
在三角学中，π弧度等于180度。
Pi appears in many mathematical formulas beyond just circles, like in probability and statistics.
π不仅仅出现在圆的数学公式中，在概率和统计等领域也出现。
Archimedes used polygons to approximate the value of
pi.
阿基米德用多边形来近似π的值。
The symbol π was first used by William Jones in 1706.
符号π首次由威廉·琼斯于1706年使用。
The quest to calculate more digits of
pi has been ongoing since ancient times.
自古以来，人们一直在追求计算π更多位数的任务。
PHNOM PENH — China's Alipay, the world's largest online and mobile payment platform, signed a partnership agreement on Wednesday with Cambodia's Pi Pay, allowing customers to use their Alipay wallets to pay at Pi Pay's Point of Sale payment systems across Cambodia.
The partnership will see Alipay become immediately available as a payment option for Chinese tourists across Pi Pay's merchant network in Cambodia, which consists of over 1,400 businesses, including high-end dinning, haute couture fashion, spa treatment, mini-marts and petrol stations, said a joint statement released at the signing ceremony here.
"With the partnership, Chinese tourists travelling to Cambodia will be able to use the Alipay app for payments wherever Pi Pay QR codes are available," it said.
"Cambodian merchants who are partnered with Pi Pay will be able to use their Pi Pay terminals to take payments from Alipay users.
"With Cambodia being a popular destination among Chinese travelers, we are excited to work with Pi Pay as our acquiring partner to benefit our users and at the same time, to provide an effective platform for local businesses in Cambodia to reach Chinese consumers," she said.
"Together with Pi Pay, we will be able to provide Alipay users the same convenience they enjoy back home when they travel in Cambodia.
Pi Pay's chief executive officer Tomas Pokorny said since its launch in July, Pi Pay has rapidly grown to become the go-to-mobile payment options across Phnom Penh, with more than 168,000 downloads of the app and $27 million being spent or transferring by users.
"The partnership will allow Alipay customers to pay for goods and services in Cambodia through Pi Pay terminals," he said.
Pi Jianlong, a member of the 14th CPPCC National Committee and head of the Beijing Jintai Law Firm, said: "There are certain deficiencies in the protection and support of the private economy in the current laws, especially a lack of legislation for the development and protection of private enterprises.
Pi has proposed to the two sessions that the law should provide detailed regulations for private economic entities in key areas, such as the protection of property rights, market access, investment and financing, and fair competition.