Explanation: Lean: less. A person to seven years old. Usage: Partial official; as object; that 70-year-old male Source: Tandoori Fu "Qujiang two": "Wine Claims Department has an unusual line, life is rare since ancient times seventy." Examples: Seventy ~ once in a lifetime. ★ Ming Feng Meng, "Awaken the common saying only solution of the Cloud Gate Taoist Lee"