Photons have no mass—they are weightless.
光子没有质量—它们是无重的。
...weightless silk curtains.
轻柔的丝质窗帘
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 human body's response to weightlessness.
人体对失重的反应
英汉双解词典包含141091条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。