慢速英语:科学家称美国西部高温天气加剧野火

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century – n. a period of 100 years

regional – adj. describing a part of a country or of the world that is different or separate from other parts in some way

key – adj. extremely important

decade(s) –n. a period of 10 years

extensive – adj. very full or complete

conclude(d) – v. to decide something after a period of thought or research

held hostage – idm. held against one's will