SSS 2011-08-12

This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr

发表于:2019-01-08 / 阅读(69) / 评论(0)

Scientific American(八)月

流行美语第140课 - boonies / country bumpkin

Larry和李华两人正开着车，准备到乡下的一个农场去骑马。今天李华会学到两个常用语：boonies和country bumpkin. (Car driving on country road) LH: Larry，我们要去的那

发表于:2019-01-08 / 阅读(77) / 评论(0)

美国之音《流行美语》

英语杂谈：49 Ties,ties,ties

For fans of fashionable neckwear for men, what's old is new again. Now Mo Rocca who follows these matters has his own ideas about that. Way back in the 1990s, freedom was ringing everywhere. Women were making huge inroads in the workplace. As for men

发表于:2019-01-09 / 阅读(80) / 评论(0)

英语杂谈

创新 Creativities

I love to see the TV show about choosing the people in singing, many years ago, when I was in high school, I would open the TV and saw the live show, many young girls were singing to fulfill their dreams, I liked to see their trying. Today, there are

发表于:2019-01-20 / 阅读(54) / 评论(0)

英语作文

【英语原版童书】Rosies Walk

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

发表于:2019-01-22 / 阅读(64) / 评论(0)

英语原版童书

Up in Annies room 鬼才知道

你一边聚精会神做功课，室友一旁翻箱倒柜找东西，烦不?这倒也罢，要命的是他还唠唠叨叨问东问西：见我钱包没?我的手表在哪儿? 晕！没好气回他一句：鬼才知道呢！对了，咱们今天就是要

发表于:2019-02-06 / 阅读(46) / 评论(0)

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air-acitvated conveyer

alternate circular ports annular spaces