标签：红外探测器 相关文章
In this Business English Pod lesson on business travel, well be looking at how to deal with security checks. In recent years getting through the security check at the airport has become a chore. In some cities, the whole process can take fifteen to t
商务英语旅游课程
AZUZ: Compared to earth's mass, Jupiter is thought to be much larger than that. And scientists say NASA's Juno spacecraft has led to new findings about Jupiter. For one thing, they believe the planet's surface has bands of gas and winds that flow ver
CNN美国有线新闻2018年4月
文本： Crack detectors work by sound. If you get two good eggs and just tap them together, you get a nice ringing noise if its good or a dull noise if its broken. And on the machines, youve got sensors and they touch the egg 16 times, each egg. An
跟着英剧练发音
A: Hello, this is Betty. B: Hi, Betty. Larry here. How many smoke detectors are in your apartment? A: Actually, I have two. B: Are the batteries fresh? A: Both batteries are good. B: Great. I need to come by and check them myself. A: No problem, when
租住公寓-Renting an Apartment
LANDMINES KILL OR BADLY INJURE around 26,000 people every year. That is one person every 20 minutes. What is worse is that they keep causing damage for decades after wars have ended. There are about 100 million landmines buried just beneath the surf
高中二年级英语
The most powerful atom smasher ever built could make some bizarre discoveries, such as new forces of nature or even extra dimensions of space, after it's switched on in August. The Large Hadron Collider, or LHC, basically consists of a ring of super
国家地理2008年
Two sisters, four and six years old, died in a late-night fire that started because of an overloaded power strip. The girls were in an unattached garage that had been illegally converted into an apartment. The new apartment did not conform to Los Ang
365个英语简短小故事
Soccer penalty kickers wearing motion sensors revealed that subtle body cues can give away which side of the net they're shooting for Those of you following the World Cup know that at this stage there can be no more draws. Ties are broken during over
60秒科学
训练有素狗狗或检测出前列腺癌 Cancer of the prostate gland is one of the leading types of cancers affecting men in their 60s. 前列腺癌是男性60多岁会患上的一种主要癌症。 According to the World Cancer Research Fund Inte
VOA标准英语2015年(十二月)
We wanna bring NBC chief science and health correspondent Robert Bazell. Bob, it's not just the Japanese people affected by the radiation. We had the Pentagon report that our aircraft carriers, the one that Richard was just talking about the Ronald R
万花筒2011年
ESA Spacecraft to Land on a Comet 欧洲航天局探测器登录彗星 After a long flight through deep space, a European Space Agency probe is finally approaching its target - a comet millions of kilometers away from earth. Scientists say the missio
VOA标准英语2014年(七月)
NASA Probing Secrets of Van Allen Radiation Belt 美国航天局探秘范艾伦辐射带 One of the first discoveries of the space age, made in 1958, was that the Earth is surrounded with a doughnut-shaped field of highly charged particles. It was na
VOA标准英语2014年(八月)
喀麦隆欢迎美国派遣军队 Boko Haram has killed about 400 civilians in northern Cameroon since last year. The group's brazen attacks in recent months have led the government to beef up its military presence in the region with backing from Cha
VOA标准英语2016年(一月)
Australian Scientists Confirm Existence of Element 117 澳大利亚科学家证实117号元素的存在 Most of the naturally-occurring elements have already been discovered, but that does not mean that new elements cannot be created - only that they
VOA标准英语2014年(五月)
The loss of the magnetic field has a catastrophic impact on the planet's evolution. Mars becomes the red planet we see today. If earths magnetic protection continues to fade, would it suffer the same fate? If it vanishes completely, the planet might
自然百科2011年
Therefore, I wrote, after examining these different hypotheses one by one, we are forced, 我一个一个研究了各种不同的假设， every other supposition having been refuted, to accept the existence of an extremely powerful marine animal. 和所
《海底两万里》中英双语有声读物
Rebecca: Look, theres smoke coming from six stories up. Hugh: Yes, I know. Didnt you hear the fire alarm go off upstairs a few minutes ago? Rebecca: No, but Im really glad theres a fire station only a few blocks away. Hey look, theres the fire engine
地道美语播客
介绍: Police: Please lay your bags flat on the conveyor /k?n?ve?.? / belt, and use the bins for small objects. 请把你的包平放在传送带上，小件物品放在箱子里。 Dan: Do I need to take my laptop out of the bag? 笔记本电脑要拿
英语俚语天天说
New images sent back by NASA's Phoenix Mars Lander during its first full day operating in the Martian northern polar region showed most of its science instruments in good health. The one snag on the lander occurred when the protective sheath around t
英语时差8，16
The Beijing Hour Morning Edition Shane Bigham with you on this Monday, July 24th, 2017 Welcome to the Beijing Hour, coming to you live from the Chinese capital. Our news focus this morning... violence and insecurity in the Middle East... including an
The Beijing Hour 新闻纵贯线