29．the average temperature of world's major cities the average temperature of world's major cities
Related Translations:
主要: main; chief; principal; major 短语和例子主要敌人 chief enemy; 这是一条繁忙的主要公路。 this is a busy main road. 这主要是由于我的过错。 it is mainly because of my fault.; 主要标志 outstanding feature; outstanding aspect; 主要部
