GMAT阅读长难句.Migraine, the most debilitating common form ofheadache, afflicts perhaps 18 million Americans, who collectively lose 64million workdays year and thus cost the nation $50 billion in medical expensesandlostwork time.
GMAT阅读长难句分析:Migraine/, the most debilitating common form ofheadache/, afflicts perhaps 18 million Americans/, who collectively lose 64million workdays year/ and thus cost the nation $50 billion/ in medicalexpenses and lostwork time.