Crab

词形变化

Crabs 复数 Crabs the Crab

释义与例句

n.
  1. 1.

    A unit for measuring the intensity of astrophysical X-ray sources, defined as the intensity of the Crab Nebula at the corresponding X-ray photon energy.

name
  1. 1.

    The constellation and zodiacal sign Cancer.

    天文 宗教 哲学

词汇关系

相关短语