premature的反义词是mature
例句
1、
Premature retirement even with a golden handshake can well lead to extensive frustration and waste of scarce human resources.
过早的退休即便有优厚的退休金也会导致挫伤和浪费人力。
2、
Nowadays a premature baby has a very good chance of survival.
如今早产儿成活的希望非常大。
3、
The baby was four weeks premature.
这个婴儿早产了四周。
