Snow is common in cold countries.为什么common不能用usual代替...请说说usual和common的区别.

英语Snow is common in cold countries中……common为什么不能换成usual Snow is common in cold countries.为什么common不能用usual代替...请说说usual和common的区别. Snow is c______ in cold countries. in common in common My first is in snow but not in The snow in Shanghai is more than in Beijing 英语翻译Increase in Operational Commonality:Quality of verification and validation can be improved significantly by increasing the operational commonality.Commonality is the extent to which the system is made up of common hardware and software co Peace is the common t_____ in the world如题 This kind of club is very common in Denmark. the probiem is common in all developed countries,怎么翻译》? Competition is a common phenonmenon in our social life What is a common fraction?please explain in english What is the common part in dog and monkey? Far more common is plagiarism in dribs and drabs.翻译 Some animals hibernate under snow,because there is much air in loose snow Some animals hibernate under snow,because there is much air in l____ snow It is snow in Moscow,It's snowing.大哥大姐