慢速英语:叙利亚动乱给伊斯兰国激进组织注入活力

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incursion– n. a sudden invasion or attack

insurgency- n.a usually violent attempt to take control of a government

exploit- v.to use (someone or something) in a way that helps you unfairly

capable- adj. having the qualities or abilities that are needed to do something

revenue– n.profits made from a business