不可多得 rare; exceptional; hard to come by; hard to get; seldom encountered 不可多得的机会 rare opportunity; 不可多得的人才 exceptional talent; 不可多得的佳作 a rare specimen of good writing; 这是一本不可多得的珍本。 it's a rare book
多劳多得 get more pay for more work done; more pay for more work.; one who does more work gets more pay.; the more you work, the more you earn.; those who did more work would get more work-points.; those who work harder will earn more