Once a base is strong enough to deprotonate water, the pH scale doesn’t really work anymore.
一旦碱的强度足以使水去质子化，pH 值就不再有效了。
英语百科
Deprotonation
Deprotonation is the removal (transfer) of a proton (a hydrogen cation, H) from a Brønsted-Lowry acid in an acid-base reaction. The species formed is the conjugate base of that acid. The complementary process, when a proton is added (transferred) to a Brønsted-Lowry base, is protonation. The species formed is the conjugate acid of that base.