环行道的高速试验是在小半径，大超高，大欠超高下进行的，有着其特殊意义。
An unusual high speed test was conducted on the Loop Track under the conditions of small radius, big superelevation and large deficiency of superelevation.
详细介绍了我国24型、25 A型客车及国外几种高速客车的给排水装置，提出了我国高速试验列车给排水装置的选择建议。
The water supply and drainage equipment on the 24 type, 25a type passenger cars in our country and several high speed passenger cars abroad are described in detail.
并且高超音速飞机目前只演示过由其他飞行器携带小型无人机至高速，而且其他计划中的试验飞行器同样太小不能坐人。
Plus, hypersonic flight has so far only been demonstrated for small unpiloted craft carried to high speed by other vehicles - and other planned experimental craft are too small to carry a pilot.
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