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(单词翻译)
This is Scientific American's 60-Second Science. I'm Cynthia Graber . This will just take a minute.
Some peppers have a mild, fresh flavor. But others burn your lips and leave a lingering, numbing2 kick. If you enjoy that tingling3 thrill, you might want to say thanks. But not to the peppers themselves—to bugs4. Peppers are tasty so they’ll be eaten and have their seeds dispersed5. But the snacker has to be the right creature—which the peppers need to be birds. Some insects also like to munch6 peppers, and they may puncture7 the skin. The wound leaves an opening for a microbial fungus8. The fungus wriggles9 inside and snacks on the seeds, destroying them.
Researchers from the U.S. and Bolivia tested whether a pepper’s heat offers it protection. They published August 11th in the Proceedings10 of the National Academy of Sciences. First, they collected chilies11 from seven populations of the same pepper species over a thousand-mile area. Then they counted insect-induced scars and tested pepper heat. In regions with lots of insects, and a greater risk of death by microbe, plants tended to be much hotter. And the hot chemicals, called capsaicinonids, slow microbial growth. Birds can’t sense capsaicin. So the hot peppers kill bugs, and still attract birds. And many humans, too.
Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber .
1 transcript | |
n.抄本,誊本,副本,肄业证书 | |
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2 numbing | |
adj.使麻木的,使失去感觉的v.使麻木,使麻痹( numb的现在分词 ) | |
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3 tingling | |
v.有刺痛感( tingle的现在分词 ) | |
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4 bugs | |
adj.疯狂的,发疯的n.窃听器( bug的名词复数 );病菌;虫子;[计算机](制作软件程序所产生的意料不到的)错误 | |
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5 dispersed | |
adj. 被驱散的, 被分散的, 散布的 | |
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6 munch | |
v.用力嚼,大声咀嚼 | |
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7 puncture | |
n.刺孔,穿孔;v.刺穿,刺破 | |
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8 fungus | |
n.真菌,真菌类植物 | |
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9 wriggles | |
n.蠕动,扭动( wriggle的名词复数 )v.扭动,蠕动,蜿蜒行进( wriggle的第三人称单数 );(使身体某一部位)扭动;耍滑不做,逃避(应做的事等) | |
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10 proceedings | |
n.进程,过程,议程;诉讼(程序);公报 | |
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11 chilies | |
n.红辣椒( chili的名词复数 ) | |
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