a. having little or no weight or apparent gravitational pull; light
a. 无重量的, 失重的, 不重要的
1. Astronauts feel weightless when they are in space.
宇航员在太空中感到失重。
2. The magician made the object appear weightless during the trick.
魔术师在表演时让物体看起来失重。
3. In a swimming pool, you can feel almost weightless.
在游泳池里，你几乎可以感到失重。