单词:electric metallic tubing
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The Coliseum Rome, that great 1) witness to a past rich in history, that great collection of 2) artistic masterpieces, which together, form the most complete 3) unmatchable expression of human achieve
Electric Fish 发电鱼 One way that Harold Zakon and his team find fish to study is to put electrical detectors into the bottom of murky streams in Venezuela. This works because certain fish emit pulses of electricity. Discover electric fish -- on tod
Broadcast: Feb 07, 2003 There are many families in the United States who enjoy taking vacations to ski areas during the winter months. But often not all members of the family ski or want to ski. A num
This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Forget the scalpel, researchers at Johns Hopkins University have created a tool that can move easily through tissue, potentially making biopsies much less invasive.
This show is centered on an in-depth report that concerns child labor, a large African country and the element of cobalt. We're explaining how all those things are tied together. First, the issue of child labor. The United Nations defines this as wor
Metallic,队如其名,是世界首屈一指的重金属乐队,比Bon Jovi更有名,比枪花更严肃。Metallica在不断的创造着新的音乐元素:Thrash Metal、Death Metal、Speed Metal、Black Metal,他们不甘心看着重金属摇