old story of south of city  城南旧事

Authenticity,Repairing the Old Like the Old  不知所措; 晕头转向

new-generation-old reservoir-old sealing formation  新生古储古堵

Old Day Embedded in Old Dictionary  老字典埋着老日子

old oil =old crude  老油

old well in old field  老区老井

Remain old appearances of old buildings in restora  修旧如旧

repair the old as old  修旧如旧

“Thousand year old”duck eggs  松花皮蛋

≤40 years old  40岁以下

≥55 years old  ≥55岁

0 - 4-year-old children  0～4岁儿童

0～5 old years of children  0~5岁儿童

0~6-year-old children  六岁以下儿童

0-3 years old children  0～3岁儿童

1 year old  1a生

10 years old group  10岁组儿童

100 years old senilities  百岁老人

12- and 18-year-old students  12、18岁学生