- 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
- rustle
- rustle
- rustled
- rustles
- rustless
- rustling
- rust mite
- Ruston
- rustproof
- rusts
- rusty
- rusty blackbird
- rusty grackle
- rut
- rut
- rut
- rutabaga
- rutabagas
- Rutgers-Camden College of Arts and Sciences
- Rutgers-College of Engineering
- Rutgers-College of Nursing-Newark
- Rutgers-College of Pharmacy
- Rutgers-Cook College
- Rutgers-Douglass College
- Rutgers-Livingston College