trifid ['traɪfɪd]

例句:

• The Trifid Nebula itself represents the final phase of star formation.
  三叶星云本身代表着恒星形成的最后阶段.
  
• The Trifid is a little dimmer than the Lagoon.
  三叶星云比泻湖星云稍暗一些.
  
• Trifid got its name because in photographs it has three distinct lobes.
  三叶星云是由于在照片中呈现出三片叶子形状而得名.