例句與造句

1. If " k " is a real Pythagorean field then the zero-divisors of " W " are the elements for which some signature is zero; otherwise, the zero-divisors are exactly the fundamental ideal.
2. To construct his geometries, Dehn used a non-Archimedean ordered Pythagorean field ? ( " t " ), a Pythagorean closure of the field of rational functions "'R "'( " t " ), consisting of the smallest field of real-valued functions on the real line containing the real constants, the identity function " t " ( taking any real number to itself ) and closed under the operation ? ?!  " ( 1 + ? 2 ).
3. It's difficult to find pythagorean field in a sentence. 用pythagorean field造句挺難的