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The rescue Flora heard somebody shouting. She looked around and saw Jeff running. Befor she could move,she heard a loud noise which grew to a terrible roar. She looked at Jell, who was waving his arms. She was so surprised that she couldn't move. She
高中英语人教版第一册课本听力
Many people remember the colors of the rainbow by the acronym ROY G. BIV. For red, orange, yellow, green, blue, indigo and violet. Well, the color indigo just made news. Indigo gets its name from the plant Indigofera tinctoria and its relatives, whic
2016年Scientific American(九)月
He wears gloves and cleans his tools with alcohol to avoid contaminating the ancient salt samples with modern microorganisms.
寻访外星人
the rescue Flora heard somebody shouting. She looked around and saw Jeff running. Befor she could move,she heard a loud noise which grew to a terrible roar. She looked at Jell, who was waving his arms. She was so surprised that she couldn't move. She
高中英语听力人教版第一册
AUDIE CORNISH, HOST: It's been two years since the peak of the drinking water crisis in Flint, Mich. The state has spent more than $16 million to distribute free bottled water to residents. That program ends this week even as some residents say they
2018年NPR美国国家公共电台4月
Don: Hey, Yael, Have you heard? We've discovered two new oceans? Yael: Where? D: On Mars. Well, they aren't there any longer, but they were there a few billion years ago. Y: I thought scientists weren't sure if Mars had oceans or not. D: They weren't
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