This is Scientific American's 60-Second Science, I am Cynthia Graber.This'll just take a minute. On earth, snow crystals as we all know, form from frozen water. But scientists believe there're also flakes that fall on Mercury, and they're made of iro

发表于:2019-01-07 / 阅读(53) / 评论(0) 分类 Scientific American(六)月

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Thars gold in them thar hillsand we may have meteorites to thank. Because it appears that a rain of meteors nearly 4 billion years ago peppered the Earths

发表于:2019-01-08 / 阅读(66) / 评论(0) 分类 Scientific American(九)月

My thoughs can be so vicious Committed to a plan The fear becomes ambitious Taking me till I am gone I don't know how it starded Beating up myself I've come to realize I barely carry on each day This life is so destructive It's blowing out my mind My

发表于:2019-01-08 / 阅读(59) / 评论(0) 分类 英文摇滚歌曲

Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen

发表于:2019-01-22 / 阅读(46) / 评论(0) 分类 自然百科2011年

toolbox 工具箱 bench 工作台 vice, clamp 虎钳(美作:vise) saw 锯 bow saw 弓锯 circular saw 圆锯(美作:buzzsaw) compass saw, scroll saw 钢丝锯 fretsaw 细锯 handsaw 手锯

发表于:2019-02-03 / 阅读(52) / 评论(0) 分类 英文语法词汇

I cannot tell you you're falling apart Open your eyes if you wanna survive I want to tell you your love is a lie But I won't tell you, I won't tell you I can't leave this, I am fine inside it I don't feel bliss and I just keep hiding I've been burnt

发表于:2019-02-19 / 阅读(76) / 评论(0) 分类 英文摇滚歌曲