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
造句
用作名詞(n.)
Zu Chongzhi accurately calculated the value of pi to seven decimal places. 祖沖之很早就把圓周率準確推算到小數點后七位。
Ignoring a clunky numerical system and devising his own, he demonstrated the nature of infinity and calculated a value for pi. 他否決了當時繁冗的數字表達方式，發明出自己的數字系統，證明了自然的無窮性，并計算出圓周率的值。