The glider was in Dutch airspace.滑翔机在荷兰的领空.The plane crashed just after entering Mongolian airspace.那架飞机刚进入蒙古领空就坠毁了。The jet entered Chinese airspace without permission.那架喷气式飞机未经允许闯入中国领空。The plane left British airspace.飞机...
Astronauts work in weightless conditions.宇航员在失重的条件下工作。...weightless silk curtains.轻柔的丝质窗帘Photons have no mass—they are weightless.光子没有质量——它们是无重的。Helen described life in a weightless environment during her period in space...