Experience is a hard teacher because she gives the test first, the lesson afterwards.经验就像一个很严格的老师，因为她总是先给我们以考验，然后再给我们上课。 Vernon Sanders Law
Experience is a hard teacher because she gives the test first, the lesson afterwards.经验就像一个很严格的老师，因为她总是先给我们以考验，然后再给我们上课。