“失重的”的英语可以翻译为：weightless，agravic ...

宇航员在失重的条件下工作。Astronauts work in weightless conditions.在失重的空间,细菌繁殖加快了.Bacterial reproduction is accelerated in weightless space.许多宇航员都证实了失重的兴奋感.Many astronauts have testified to the exhilaration of weightlessness....