ordered pair造句怎麼寫

4、A number consisting of an ordered pair of real numbers, expressible in the forma+bi, where a and b are real numbers and i squared equals minus one (i.e. i 2=-1).

2、Any ordered pair of bases makes a sequence.

1、reduced ordered pair group

3、A wordis valid if and only if each ordered pair of adjacent letters inthe word is a valid pair.