努比亚砂岩

英国学生科学读本第80期:我们脚下的土地(2)

The rock called sandstone is made up of a great many grains of sand. The beating of the rain on this rock washes the grains apart, and so the hard sandstone slowly changes into loose sand. 砂岩主要由大量沙粒组成。当雨水打下来的时候

发表于:2018-12-07 / 阅读(63) / 评论(0)

英国学生科学读本

犹他州拱门国家公园:奇怪而美丽的世界

The Strange and Beautiful World of Arches National Park 犹他州拱门国家公园:奇怪而美丽的世界 This week on our national parks journey, we travel to Utah. The western state is home to several of the most popular national parks in Americ

发表于:2018-12-16 / 阅读(120) / 评论(0)

2016年VOA慢速英语(十)月

2007-11-13, Nubian Wedding

It is modern, yet firmly rooted in the past, the Nubian wedding ritual shared by the entire village for seven days and nights. The air is perfumed by incense and filled with the sound of beating drums and joyful Nubian songs. Two years ago, Sherrie's

发表于:2018-12-30 / 阅读(146) / 评论(0)

国家地理2007年

60秒科学:先进啊,古代就有了四环素

Evidence mounts that ancient Nubian brewers purposely made beer so that it contained a dose of antibiotic tetracycline. Christopher Intagliata reports 有证据表明努比亚的啤酒制造者故意在啤酒中加入抗菌四环素。 In 1980, a sci

发表于:2019-01-02 / 阅读(132) / 评论(0)

60秒科学

SSS 2010-09-06

In 1980, a scientist looking at bone fragments under an ultraviolet microscope noticed the bones were glowing greena hallmark of the antibiotic tetracycline. The drug latches onto calcium and gets deposited in bone. Nothing unusual. Except these bone

发表于:2019-01-08 / 阅读(73) / 评论(0)

Scientific American(九)月

英语听力：自然百科圣河之旅 The Nile尼罗河—26

There have been centuries of tension along the Nile between Arabs and Nubians, 25 people were recently killed near here, and many more were injured during clashes between Arab and Nubian families, many Nubians still feel ostracized from Egyptian life

发表于:2019-01-16 / 阅读(66) / 评论(0)

自然百科2015年

英语听力：自然百科圣河之旅 The Nile尼罗河—21

We climbed the ruin side of the pyramid belonging to T*, the greatest of all Kushian f*, who not only ruled Sudan but the whole of Egypt as well. -What an epic view! This is spectacular! -Yeah. -This is what some historians recently arise has called

发表于:2019-01-16 / 阅读(72) / 评论(0)

自然百科2015年

英国学生科学读本第50期:只是一块石头(1)

Lesson 50 Only A Stone 第50课只是一块石头 What is the oldest thing you have seen? One boy thinks it is a church, for he has seen a date on one which tells that it was built hundreds of years ago. 小朋友，你见过的最古老的东西是什

发表于:2019-02-13 / 阅读(70) / 评论(0)

英国学生科学读本

英语听力精选进阶版 8125

Ukraine's interim President Alexander Tuchinov hascalled an emergency meeting of his security chiefs todeal with growing unrest in the east of the country.Pro-Russian demonstrators seized governmentbuildings in 3 major cities. From Kyiv, David Stern

发表于:2019-03-04 / 阅读(100) / 评论(0)

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absolute optical shaft encoder

acute fulminating meningococcemia

Audio stream input output

Bel'agash