Dust is a major source of iron, which is vital for plankton and other organisms that draw carbon out of the atmosphere.
灰尘是铁的主要来源。而铁对于浮游生物和有机物来释放二氧化碳是至关重要的。
2
This nebula is a bubble, and it's a bubble because intense blasts of stellar wind and radiation for a nearby star have cut through thedust and hollowed out the middle.