单词：traces of
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But it had taken Pusch and Bietak years of excavation just to unearth the garrison. At this rate of digging ,it would take hundreds of years to prove if they had truly found the site of Piramesse. And so they turned, instead, to a new technology tha
遗失的法老城市
This is Scientific American's Sixty Seconds Science. I'm Sophie Bushwick. Got a minute? To monitor the biodiversity of the freshwater habitat, you could compare by the water and count the rare wildlife. Or you could just scoop up a cup of water. A ne
Scientific American(十二)月
Youre not under arrest, despite the fact that you probably have some drugs in your pocket. Because theres a good chance your paper money contains trace amounts of cocaine. According to a study presented August 16th at the American Chemical Societys n
Scientific American(八)月
We tend to think of cavemen as pretty serious carnivores, hunting game and then roasting the yummy bits over a roaring campfire. But scientists just reported discovering traces of starch on some ancient stone tools. Which suggests that there were pro
Scientific American(十)月
今天我们要学的词是radioactive。 Radioactive, 放射性的。日本政府证实， Traces of radioactive iodine have been detected in Tokyo and the Kanto area, 东京和关东一带发现了微量放射性碘。 Tap water in a village near t
英语每日一词
今天我们要学的词是contaminated。 Contaminated污染的。A California meat company recalled about 3500 pounds of hamburger patties that may be contaminated with E. Coli. 加利福尼亚州的一个肉类产品加工厂宣布回收大约3500磅
英语每日一词