标签：Radar 相关文章
Lesson 7 Bats 蝙蝠 First listen and then answer the following question. 听录音，然后回答以下问题。 In what way does echo-location in bats play an utilitarian role? Not all sounds made by animals serve as language, and we have only to tu
新概念英语第四册
Japans domestically built X-2 stealth fighter took off from Nagoya on Friday in a maiden flight that highlights the accelerating arms race in East Asia. 周五，日本国产隐形战斗机X-2从名古屋起飞，完成了处女航。这次试飞凸显
英语新闻
[00:03.68]为什么？ Why? [00:06.95]啥？ Why? [00:09.58]为什么？ Why? [00:11.78]啥为什么？ Why what? [00:13.84]为什么？ Why? [00:14.91]为什么？ 我不知道 Why? I dont know. [00:15.78]为什么？ 我不知道 Why... I dont know
听电影学英语-战争之王
One of the fastest growing activities in America is playing poker, often for money online. Now a new law targets Internet casinos and the cash they pay out, as CBS news correspondent Jim Acosta tells
万花筒2006年
AS IT IS 2016-04-01 Security Summit Focuses on N. Korea, Terror Threat 核安全峰会聚焦朝鲜核威胁 U.S. President Barack Obama opened his final nuclear security summit in Washington on Thursday, expressing concerns over North Korea's nuclear
2016年VOA慢速英语(四)月
And here it is, the flight of the humblebee. This is what's called its exploratory path. The routine takes its circles around the hive for the first time. Over several days it's built up a mental map more than 10 square kilometers around the hive. Th
探索与发现2013年
Very roomy. For a single-seat fighter it's spacious. Plenty of room to lay out stuff we carry with us. The nose is cut and you won't see any perpendicular surfaces go around. The four probes in the front are not machine guns. And they are not hologra
国家地理2007年
Hundreds of coalition airplanes were in the sky at any one time. Airborne warning and control system airplanes better known as AWACS kept air traffic straight. Largely thanks to AWACS there were no air-to-air friendly fire incidents during the Gulf W
国家地理2007年
The Viking longship might have looked like this. A 1,000-year-old Viking longship is thought to have been discovered under a pub car park on Merseyside. The vessel is believed to lie beneath 2 metres to 3 metres of clay by the Railway Inn in Meols,
Take Away English
Conservationists are overestimating the number of species that have been driven to extinction(消失), scientists have said. A study has found that a third of all mammal species declared extinct in the past few centuries have turned up alive and well
英语新闻
Hello, I am Naamua Delaney at the CNN center in Atlanta and here is a look at what's happening NOW IN THE NEWS. We have new details on a terrorism investigation in New York and Colorado. Sources close to the investigation tell CNN the suspects may h
CNN2009年(九)月
This is Scientific Americans 60-Second Science. Im Steve Mersky. Got a minute? You probably missed it because you were sleeping. But one of North America's great natural phenomenon happened over the nights of mid-spring. After sundown, the skies fill
Scientific American(六)月
President Obama congratulated Iraqis for coming out to vote in todays parliamentary elections in spite of violence by insurgents that killed at least 38 people. That's the sound of the morning call to prayer during voting this morning at a Baghdad po
2010年NPR美国国家公共电台3月
1. This rescue caught on tape is a result of heavy rain and high winds. Floodwaters now cover much of central Oklahoma. Scenes like this one have been playing out all day as rescue crews search for residents trapped because of the rising water. 2. If
美联社新闻一分钟2007
1. Colorado officials say a massive avalanche buried several cars on US Highway 40 about 60 miles west of Denver. At least 7 people have been rescued. Crews are searching for more survivors. Snow fell on the area on Friday, the third snowstorm in th
美联社新闻一分钟2007
最近，《孤独星球》评选出了2016年的亚洲最佳景点，有繁华的上海和香港，也有自然景观一流的昆岛和台东。暑假到了，小伙伴们不妨沿着《孤独星球》的清单，背包一探究竟呢! 10. Taitung,
旅游英语
Halo works because of several factors 由于下降速度快 High downward velocity and minimal metal and forward air speed, 金属赘物少 气流速度快 which all serve to defeat the radar.Wow! Just amazing! 高跳低开术可以避开多数的雷达
荒野求生
WASHINGTON, July 7 (Xinhua) -- U.S. federal transportation authorities are still in the initial stages of their investigation into Saturday's deadly crash landing of an Asiana Airlines Boeing 777 commercial plane at San Francisco International Airpor
英语新闻
PERTH, Australia/KUALA LUMPUR, April 6 (Xinhua) -- Chinese and Australian ships have picked up acoustic signals while searching for missing Malaysia Airlines Flight MH370 in the southern Indian Ocean. The underwater detection represents an important
英语新闻