单词：dinoflagellatatoxin
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Dialogue A Patty and Dino are arguing about a business deal they had. Patty：Listen! We agreed that you would give me half of the profits. Dino：I want to change that now. Patty：You can't. We shook on it and you have to keep your word. Dino：I c
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Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is abo
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Bizarre Dino 远古巨兽 by Kevin Lustig Around the world, scientists are constantly in search of dinosaurs. Real ones disappeared about 65 million years ago, but dinosaurs left behind a lot for humans to study, like eggs, bones, and entire bodies.
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As long as there have been mice, people have sought a better mousetrap. And since we figured out that bacteria can make us sick, weve searched for better
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48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bac
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