常年[chángnián]1. [throughout the entire year]:一年到頭2. [long-term;year in year out]:長期\n常年[chángnián][average year] 一般的年份這兒小麥常年畝產五百斤
長年[chángnián]1. [all the year round]:終年;全年築路工人長年奮戰在風雪高原2. [long-term labourer] 〈方〉:長年僱工3. [long-lived;long life;longevity]:壽命長\n長年[zhǎngnián]1. [shipowner]〈方〉:船的主人2. [boatman]:船工3. [the aged]:指老年人
[all year;all the year;whole year] 完整的一年