英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
spits查看　spits　在百度字典中的解释百度英翻中〔查看〕
spits查看　spits　在Google字典中的解释Google英翻中〔查看〕
spits查看　spits　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Helicopter - Wikipedia
    The Focke-Wulf Fw 61 was the first successful, practical, and fully controllable helicopter in 1936, while in 1942, the Sikorsky R-4 became the first helicopter to reach full-scale production
  • Helicopter | Facts, History, Types | Britannica
    A helicopter is an aircraft with one or more power-driven horizontal propellers or rotors that enable it to take off and land vertically, to move in any direction, or to remain stationary in the air
  • How Helicopters Work - HowStuffWorks
    One thing that has characterized the helicopter since its invention in the 1930s has been the absurdity of the machine The contraption simply looks unable to deliver on its promise, which is to fly up and down, backward and forward, right and left
  • Helicopters - Airbus
    Airbus helicopters are an essential tool for first responders, firefighters, public service operators and military customers flying critical missions across the globe
  • How does a helicopter work? - Explain that Stuff
    The science of a helicopter is exactly the same as the science of an airplane: it works by generating lift—an upward-pushing force that overcomes its weight and sweeps it into the air Planes make lift with airfoils (wings that have a curved cross-section)
  • 21 Types of Helicopters Explained (A Full Guide)
    A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally-spinning rotors This allows the helicopter to take off and land vertically, hover, and fly forward, backward, and laterally
  • Justhelicopters. com - Rotor Pro Current Issue
    Thousands of helicopter professionals from 160+ countries "worldwide" visit JustHelicopters com every day, making it the Helicopter Industry's #1 Online Resource! Whether a Helicopter Pilot, Helicopter Student, Helicopter Mechanic, Employer, Helicopter Flight School, Helicopter Business, or an enthusiast, JustHelicopters com has something for you
  • 25 Types Of Helicopters | Uses And Examples – Engineerine
    In today’s world, helicopters are a common sight in many parts of the globe They are used for various purposes, including traffic monitoring, community policing, and cargo transportation
  • Types of Helicopters Explained: Light Utility, Transport, and Heavy . . .
    Since practical flights began in the 1930s, helicopters have split into clear categories: light trainers and patrol craft, medium EMS and police models, and heavy platforms for troop and cargo transport Each category balances lift, range, and speeds against operating cost and complexity
  • Helicopters - National Air and Space Museum
    A helicopter is an aircraft that is lifted and propelled by one or more powered rotating wings called rotors This allows them to operate from small landing sites





中文字典-英文字典  2005-2009