单词：novarsenobenzene
单词：novarsenobenzene 相关文章
We present the second of three parts of the short story Benito Cereno. It was written by Herman Melville. Last week, we told how African slaves on a Spanish ship rebelled in seventeen ninety-nine. They killed most of the Spanish sailors. Only the cap
2017年VOA慢速英语(十二)月
We present the last of three parts of the short story Benito Cereno. It was written by Herman Melville. As we told you in earlier parts of our story, rebel slaves seized the ship San Dominick off the coast of Chile. They killed many of its officers a
2017年VOA慢速英语(十二)月
We present the second of three parts of the short story Benito Cereno. It was written by Herman Melville. Last week, we told how African slaves on a Spanish ship rebelled in seventeen ninety-nine. They killed most of the Spanish sailors. Only the cap
2018年VOA慢速英语(十)月
This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr
Scientific American(八)月
Indoor air pollution is a common threat to human health, the new study looked at five common house plants and found that when it comes to removing harmful chemicals from the air, those five plants are better than others. 室内空气污染对人类健康
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本期内容： A humble houseplant with a dash of rabbit DNA could help lower our exposure to indoor air pollution, new research suggests. Scientists have revealed that by inserting a rabbit gene into devils ivy the plant is able to clean the surrou
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