One of Barack Obama's first acts as president was lifting the U.S. restrictions on medical research using embryonic stem cells.
巴拉克·奥巴马宣誓就职后施行的第一批政策中，加强对胚胎干细胞医疗研究的限制赫然在列。
Before there were space shuttles, there were "lifting body" research aircraft used to validate ideas on how an airplane-like spacecraft might re-enter the atmosphere and fly back to Earth.
有航天飞机之前，有“升力体”研究飞机用于验证飞机如何像飞船可能重新进入大气层，飞回地球的想法。
Based on the theoretical research and prototype fabrication of traveling wave type ultrasonic motor, the traveling wave type ultrasonic motor used for lifting glass for vehicle window is developed.
在超声波电机理论研究和样机制作的基础上，开发了用于汽车车窗玻璃升降的行波型超声波电机。
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