weightiness

weightiness的英语例句

1. Astronauts work in weightless conditions.

   宇航员在失重的条件下工作。

2. Photons have no mass—they are weightless.

   光子没有质量——它们是无重的。

3. 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。