86

　　不經(jīng)一事，不長一智

　　Experience is the mother of wisdom.

　　87

　　不舍晝夜(24小時(shí))

　　Some convenience stores offer around the clock service.

　　88

　　不勝其煩

　　Your little brother is a pain in the neck.

　　89

　　夜以繼日

　　day and night

　　90

　　少不更事

　　Although she is 20, she was still wet behind the ears in some ways.

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