location used by bats, many marine organisms, and submarine sonar whereby pulses of sound are emitted and the reflections of the waves (the echoes) off of objects are translated into images in the brain (or by electronics) to create a spatial image of the shape and locations of the objects...
a高精度的导航定位是潜艇研究中所面临的主要难题之一 The high accuracy navigation localization is one of main difficult problems which in the submarine research faces[translate] a多次变更负荷。 Changes the load many times.[translate] a今晚同事邀请去KTV Tonight the colleague invites KTV[translate] ...
When was the ballistic missile invented? The first ballistic missile was the V-2 rocket, which was created in Nazi Germany during World War II. It was invented by Walter Dornberger and Wernher von Braun, and was first used in1944, to attack London, England. ...
a然而,日前在eVolo摩天大楼竞赛中,有设计公司特别提到了可漂浮式水下摩天大楼的方案。 However, on the other day in the eVolo skyscraper competition, had the design company to mention specially might float the type submarine skyscraper the plan.[translate] ...
The Strategic Defense Initiative (SDI), derisively nicknamed the "Star Wars program", wasa proposed missile defense system intended to protect the United States from attack by ballistic strategic nuclear weapons (intercontinental ballistic missiles and submarine-launched ballistic missiles). ...
3.Tea,themostpopulardrink,isa(n)accidental(accident)invention.;4.【历史与文化】IntheTangDynasty,Yangzhouwasanimportant trade/trading(trade)centerinChina. 5.(教材素材改编)Itssaid(say)thatShenNongwasthefirsttodiscoverteaasadrink. 6.Theballoonfellintothewaterandstayedthere.;7.【湖南人文】Youwontfindit...
Huang Xuhua, 1926-Nuclear submarine designer Huang was the chief designer of China’s first-generation nuclear submarine(核潜艇). Tu Youyou, 1930-Scientist She discovered artemisinin(青蒿素) , a medicine that can be used to treat malaria(疟疾). ...
B.The three beagles have similar inner cheeks to each other. C.The device may work better for drugs with small molecules. D.Researchers injected different drugs to beagles in the first test. 4. What is the unsolved problem for the device?
The depletion of the ozone layer was caused by the release of CO_2 (carbon dioxide) into the atmosphere. A. True B. False Once the first tsunami wave comes ashore, you can expect subsequent waves to be the same size or smaller. A) True B) False A newly formed vo...
For the first time on Disney Cruise Line, a 20,000 Leagues Under the Sea-inspired pub blends a variety of inspirations from the film and the attractions to make it feel like you’re on a submarine. As soon as you enter, you spot a blue ceiling with hints of creatures of the deep —...