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VOA慢速英语:科学家用无人机研究鲸鱼的健康
2019-02-07来源:和谐英语
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mucus – n. a wet, sticky liquid produced inside the nose and other body parts
visible – adj. able to be seen
plume – n. something (such as smoke, steam, or water) that rises into the air in a tall, thin shape
spray – n. liquid that is forced or blown through the air
pattern – n. a model; a repeated design
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