1·Everyone should have access to the great works of the world, whether heavy (Shakespeare, “Moby-Dick”, pi to 1m places), or light (Peter Pan, Sherlock Holmes, the “Kama Sutra”).
所有人都应该可以阅读世界上的著作，不管是厚重的（莎士比亚，“白鲸记”，圆周率记录到小数点后一百万位），还是轻便的（彼得潘，夏洛克·福尔摩斯，“爱经”）。
2·You expect your child to know as many digits of PI as their age.
你希望你的孩子能记住的圆周率位数越多越好。
3·I wanted to choose 3, 7, 22 or 227 because they are used when estimating PI, but some other students must have had the same idea.
我想选3、7、22或227，因为在估计圆周率时要用到它们，但其他一些学生肯定有同样的想法。
4·Mathematics enthusiasts will this weekend be celebrating Pi day, which falls on 14 March in honour of the famous ratio's first few digits, 3.14.
数学迷们将在本周末庆祝他们的圆周率日，这一天之所以落到3月14号是为了纪念这个这个著名比例的头几位：3.14。
5·He used a computer, but you can also calculate pi at home with some needles and a sheet of lined paper.
当然，贝拉德要求助于电脑，不过你也可以用最简单的办法在自家客厅计算圆周率，所用材料只是几根针和一张横格纸。
1·Secondly, a method of pole assignment is put forward for designing switching surfaces of PI type.
其次提出了一种比例积分型切换超平面的极点配置设计方法。
2·The proposed method combines the advantages of both the fuzzy and PI control.
该控制方法结合了模糊控制和比例积分控制的优点。
3·A DC voltage outer loop control for power balance and PI correction and an ac current inner loop control for feedback are designed to ensure the current quality and stabilize the DC voltage.
通过直流电压外环的功率平衡控制及比例积分校正，配合内环并网电流反馈控制，使并网逆变器在保持并网电流质量的同时更好地控制直流电压。
4·A kind of nonlinear PI controller is presented in this paper. The theory analysis and experiment result prove that the nPI can improve static and dynamic characteristics of control system obviously.
本文提出一类非线性比例积分控制规律，理论分析和应用结果表明，它能显著改善控制系统的静态和动态性能。
5·This paper presents a decoupled control scheme for three?phase four?leg inverter through an inner current regulator based on space vector cascaded with an outer synchronous frame PI controller.
该文提出了一种采用内环空间矢量电流调节器和外环同步坐标比例积分控制器相级联的三相四桥臂逆变器的控制方案，实现了对三相四桥臂逆变器的解耦控制。