| 例句 |
NASA has used the space shuttle to study how materials perform in a weightless environment.美国国家航空航天局利用航天飞机研究物质在失重环境中的表现。She floated in the pool, weightless.她轻飘飘地浮在泳池里。Helen described life in a weightless environment during her period in space.海伦描述了她身处太空时失重状态下的生活。The astronauts are living in a weightless environment. 航天员们生活在失重的环境里。There is a lot of interest in carrying out experiments in the weightless conditions which are experienced aboard space stations.在空间站那种失重状态下做实验非常有趣。Photons have no mass − they are weightless.光子没有质量，是失重的。Astronauts have problems moving around in the spacecraft because they are virtually weightless.宇航员在太空船里活动有困难，因为他们基本上处于失重状态。Scientists used the space station to study physical phenomena in a weightless environment.科学家们用空间站研究失重环境下的自然现象。 |