大學英語作文:未來空中交通工具 A future vehicle in the air

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while many technological advances occur in an evolutionary manner, occasionally a revolutionary technological appears on the horizon that creates startling new conditions and profound changes.such is the case with the privately developed moller skycar, which is named after its inventor.with his permission, i would like to discuss the military potential of this vehicle.the ruggedized moller skycar variant the military is evaluating is called the light aerial multipurpose vehicle, or lamv (pronounced "lam-vee").技術(shù)的進步大多以漸進的方式進行，但有時可能出現(xiàn)突破性進展，帶來令人吃驚的新情況和深遠的變革。私人研制的"莫勒空中汽車"的情況就是如此，這是以其發(fā)明家的名字命名的。征得他的同意，筆者愿意探討-下這種運載工具的軍事潛力。美軍目前正在進行評估的加固型"莫勒空中客車"，叫做輕型空中多用途運載工具，或縮稱lamv(讀作"lam-vee")。the lamv is a vertical take-off and landing aircraft that can fly in a quick, quiet, and agile manner.it is a new type of vehicle that combines the speed of an airplane and the vertical take-off capability of a helicopter with some characteristics of a ground vehicle, but without the limitations of any of those existing modes of transportation.lamv是一種垂直起降航空器，能以快速、低噪音、敏捷的方式飛行。這是一種新型的運載工具，它將飛機的速度、直升機的垂直起飛能力與地面運輸工具的某些性能結(jié)合到一起，但卻沒有這些現(xiàn)行運輸方式的局限性。the lamv is not operated like traditional fixed -- or rotary-wing aircraft.it has only two hand-operator uses to direct the redundant computer control twists to select the desired operating altitude and moves fore and aft to select the rate of climb.the right-hand control twists to select the vehicle's direction and moves side-to-side to provide transverse (crosswise) movement during the hover and early-transition-to-flight phases of operation; it also moves fore and aft to control speed and braking.simply put, the lamv is user friendly.lamv的操作不同于傳統(tǒng)的固定翼飛機或旋翼式飛機。它只設有兩個手操控制器，操作員通過它們來操縱冗余計算機控制系統(tǒng)去執(zhí)行所需的飛行動作。 轉(zhuǎn)動左手控制器可選擇所需要的飛行高度，前后移動左手控制器可選擇上升速度。轉(zhuǎn)動右手控制器可選擇飛行方向，左右移動右手控制器可控制盤旋時和從開始過渡到飛行階段的橫向動作;還可前后移動右手控制器控制速度和制動。簡而言之，lamv對用戶來說是易于操作的。the lamv of the future will be 18 feet long, 10 feet wide, and 6 feet high and weight 2,200 pounds.it will hold four passengers and a payload of 875 pounds (including fuel).the vehicle will have a maximum rate of climb of 6,400 feet per minute and an operational ceiling of 30,000 feet.it will attain a top speed of 390 miles per hour at an altitude of 6,000feet and a cruising speed of 350 miles per hour at 25,000 feet, and it will have a maximum range of 900 miles at 80 passenger miles per gallon.the lamv also will be quiet enough to function as an acoustic "stealth" plane at 500 feet.it will have a vertical take-off and landing capability and emergency airframe parachutes, and it will be capable of using various fuels.未來的lamv長18英尺，寬10英尺，高6英尺，重2200磅。它可運載4名乘客，有效負荷為875磅(包括燃料)。它的最大爬升速度為6400英尺/分，實用上升限度為30000英尺。在6000英尺高度的最高飛行速度為390英里/小時，在25000英尺高度的巡航速度為350英里/小時，在每加侖燃油的客英里數(shù)為80時的最大航程為枷英里。在500英尺高度時，lamv的噪聲會很小，可作為"隱"聲飛機使用。它將具有垂直起落能力，并配備有應急機體降落傘，而且它將能夠使用多種燃料。