sulphur pearl

短语

词形变化

sulphur pearls 复数 sulphur pearls

别名

sulfur pearl

释义与例句

n.
  1. 1.

    a very large, but harmless, bacterium, Thiomargarita namibiensis, that grows as a string of white beads large enough to be visible to the naked eye in the coastal sediments of Namibia