单词：cold light operating lamps
单词：cold light operating lamps 相关文章
This is the VOA Special English Development Report. Dave Irvine-Halliday in Mexico More than one and a half billion people around the world live without electricity. Finding better ways to bring light to the poor is the goal of researchers like David
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With the last of April the sun disappeared, leaving only a faint glint of brightness now and then along the horizon. 四月的最后一天，太阳消失了，只在地平线上留下一点忽闪忽现的微弱光芒。 Inside the huts, however, a fl
美国小学英语教材5
Lesson 25 [00:10.95]第二十五课 [00:12.36]Just speak [00:11.86]说 [00:11.36]Dad, look at the lamps.They're so nice! Can I have one,please? [00:14.63]爸爸,看这盏灯.它们是如此漂亮! 我可以拥有一盏吗? [00:17.91]Sure! [00:17.41]可
人教版小学英语五年级
By Prospero Laput Zamboanga del Norte, Philippines 16 July 2007 Electricity has yet to reach hundreds of villages in the Philippines. The Philippine government is tapping innovative technology to light up some villages, but in this report by producer
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It was the summer of 1878. Tom had been working hard for a long time. He was thinking about taking a vacation. Then a friend invited him to join a group of scientists. They were traveling by train to Wyoming to see an eclipse of the sun. Tom decided
名人认知系列 Who Was
Why Are Some Headlights Blue-High Intensity Discharge Lamps 高强度气体放电（High-intensity discharge，简称HID）灯泡包含了下列这些种类的电灯：水银灯、金属卤化灯（也称作HQI）、高压钠灯、低压钠灯、高压
英语听力文摘 English Digest