shortage of和lack of的区别
shortage of medicine
shortage of money
shortage of water
shortage of resources
shortage of labor
shortage of time
shortage of space
shortage of shelters
shortage of jobs
shortageof是什么意思
shortage是什么意思
shortage是什么意思中文
shortage怎么读
shortage可数吗
shortage的反义词
shortages是什么意思
shortage和lack的区别
shortage的用法及短语
shortage音标