| 单词 | heat barrier |
| 例句 | The X-2, for instance, was designed to penetrate the “thermal thicket,” also known as the “heat barrier,” where conventional metals begin to melt, according to the New York Times. A Cold War spy satellite and a rocket-powered plane: Aerospace giant Richard Passman had a career kids could only dream of 2020-06-20T04:00:00Z Others said later that space vehicles would never get through the heat barrier. The Practical Values of Space Exploration Report of the Committee on Science and Astronautics, U.S. House of Representatives, Eighty-Sixth Congress, Second Session |
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