一片霞

国家地理-2008-03-20 Rho Ophiuchi Cloud 璀璨的星云

Rho Ophiuchi dark cloud is one of the closest star-forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. The infrared astronomical satellite, now celebra

发表于:2018-12-05 / 阅读(116) / 评论(0)

国家地理2008年

SSS 2012-08-13

Elephants dont need cell phones to hold long distance conversations, their deep calls can travel miles. And although humans cant always hear these vocalizations because of their low frequency, elephants produce them using the same mechanism that lets

发表于:2019-01-08 / 阅读(47) / 评论(0)

Scientific American(八)月

VOA标准英语2010年-Throat Cancer Largely Due to Smoking A

Actor Michael Douglas has become the international face of throat cancer since he announced he had the disease. The actor says his doctors give him an 80 percent chance of beating the cancer. Michael Douglas didn't speak to reporters at the premiere

发表于:2019-01-14 / 阅读(70) / 评论(0)

VOA标准英语2010年(九)月

Adams Apple: 喉结

Adam's Apple: 喉结有一个词语叫成长，它会使种子发芽、小树长高，也会让毛头小伙瞬时肩宽臂阔，让黄毛丫头转眼婀娜多姿。不用详细解析，想必您也清楚， Adam's Apple（喉结）亦是成长期第二

发表于:2019-01-21 / 阅读(102) / 评论(0)

英语口语

【英语时差8，16】男孩变声时

For adolescent boys, a changing voice that cracks in the middle of a sentence can be a great embarrass-ment. Though embarrassing, a cracking voice is a natural part of adolescent development. As a boy goes through adolescence, his secondary sex chara

发表于:2019-01-22 / 阅读(52) / 评论(0)

英语时差8，16

英语听力：自然百科 Rho Ophiuchi Cloud 璀璨的星云

Transcript for Reference Only --chunshan The infrared astronomical satellite, now celebrating its 25th anniversary, gave us the first all sky view of our dusty infrared universe. Floating above the galactic center is the Rho Ophiuchi Cloud, about 400

发表于:2019-02-26 / 阅读(170) / 评论(0)

自然百科2008年

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学英语单词

0757

abelianness

accelerating pump jet

acpi

Amancey

arithmetical invariant