- A nebula, such as the Ring Nebula, consisting of a hot, blue-white, central star surrounded by an envelope of expanding gas.行星状星云：由一颗炽热的、蓝白色的中心恒星和包围它的一层向外膨胀的气体组成的星云，如环状星云
- seaside
- Seaside
- seaside finch
- seaside sparrow
- sea slug
- sea snail
- sea snake
- season
- season
- seasonable
- seasonal
- seasonal affective disorder
- seasoned
- seasoner
- seasoners
- seasoning
- seasoning
- seasonings
- seasons
- season ticket
- sea spider
- sea squirt
- sea star
- seastrand
- sea swallow
- 坡梁
- 坡田
- 坡组词
- 坡老
- 坡谷
- 坡道
- 坡野
- 坡长限制
- 坡陀
- 坡陁
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