a summer's day的用法和样例：
- I bought a pair of tan leather shoes the other day.
- He has a large amount of mail to answer every day.
- People in this locality used to take two meals a day.
- It's natural to slack2 off towards the end of a hard day's work.
- The next day a picnic was arranged in a beautiful coppice.
- The eggs began to decompose after a day in the sun.