虽然lack 与shortage是近义词，但用法不同！ lack的常见用法为：lack of 而shortage则有多种，像a shortage of; housing/food shortage; acute/severe shortage都可以！lack 如：1）new parents suffering from lack of sleep2）Too many teachers are treated with a lack of respect.3）comments based on a total lack of information 4）Does their apparent lack of progress mean they are not doing their job properly? 5）tours that are cancelled for lack of bookings 6）There was no lack of willing helpers.7）health problems linked to poor diet and a relative lack of exerciseshortage如：a shortage of skilled labour There is no shortage of funds.efforts to solve the housing shortagean acute shortage of manpower
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