慢速英语:Second Texas Nurse with Ebola Flew on Plane on Monday

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commercial – adj. making or intended to make a profit

raid – n. a sudden attack carried out for the purpose of seizing or stealing something

ring – n. an exclusive group working for a selfish and often illegal purpose

recruit – v. to persuade (someone) to join you in some activity or to help you

surveillance – n. the act of carefully watching someone or something

envoy – n. a person who is sent by one government to represent it in dealing with another government