the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
someone who can be employed as a detective to collect information
the scientist in charge of an experiment or research project
the 16th letter of the Greek alphabet
an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
双语例句
用作名词 (n.)
Zu Chongzhi accurately calculated the value of pi to seven decimal places. 祖冲之很早就把圆周率准确推算到小数点后七位。
Ignoring a clunky numerical system and devising his own, he demonstrated the nature of infinity and calculated a value for pi. 他否决了当时繁冗的数字表达方式，发明出自己的数字系统，证明了自然的无穷性，并计算出圆周率的值。
