71, than necessary 比应该的要冷
The lab was cooler than necessary.
72, That’s easer said than done. 说来容易做来难
73, There is nothing to it. 没什么，很容易
I can run this projector. There’s really nothing to it.
74, with flying colors 成功
A: How did Ellen do on her American History exam?
B: She passed with flying colors.
75, You can bet your life 当然
A: Will Prof. Smith come to class on time?
B: You can bet your life.
