单词：vacuum incandescent bulb
单词：vacuum incandescent bulb 相关文章
Iran is claiming its building a copy of a US surveillance drone it captured last year. The chairman of the Senate Homeland Security Committee is skeptical. NPRs Allison Keyes reports. Irans military says experts have extracted data from the RQ-170 Se
2012年NPR美国国家公共电台4月
Here are two things that nobody wants to see increase: your power bill and pollution. Boo! We're going to show you a small step you can take that can turn these arrows the other way. Yay! We're focused on your friendly household light bulb, the incan
英语解说豆知识2009年
This is Scientific American 60-Second Science. I'm Cynthia Graber. This will just take a minute. The fridge is one of your home's biggest energy hogs. Better insulation can make refrigerators much more efficient. And a panel encasing a vacuum is one
Scientific American(五)月
One of the two kitchen light bulbs was out. It was circular and fluorescent. He placed a chair under the light. He stood on the chair. He unscrewed three screws. He removed the plastic cover. He removed the bad bulb. He inserted a new one. He screwed
英文短篇故事（纽约）
By Mario Ritter Broadcast: November 18, 2003 This is Steve Ember with the VOA Special English Agriculture Report. If you like flowers in the early spring, then the middle of autumn is an important tim
VOA2003（下）-农业与经济
今天我们要学的词是light-bulb moment。 Light-bulb moment, 电灯泡时刻，可不是当电灯泡的意思。 A light-bulb moment is when you have a sudden realization about something, 电灯泡时刻是指你突然醒悟的那一瞬间。 P
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