四則運算

the four basic operations of arithmetic (addition, subtraction, multiplication and division)

four / 4

(conjunction used to express contrast with a previous clause) but / then / standard / norm / principle / to imitate / to follow / classifier for written items

(literary) (conjunction used to express contrast with a previous clause) but; then / (bound form) standard; norm / (bound form) principle / (literary) to imitate; to follow / classifier for written items

to move / to transport / to use / to apply / fortune / luck / fate

to perform calculations / (mathematical) operation

to regard as / to figure / to calculate / to compute