快活快活罷；別相信還早哩。

 胡適日記全集 7: 1934-1939 p.458
1938.1.5
Colonel Newell 家的小石碑上有

Enjoy yourselves, it's later than you think.
( 原文Enjoy yourselves, It's later than you think.)

胡適的譯文刻在背後
他重譯為

 
快活快活罷；別相信還早哩。