orbiting astronomical observatory
轨道天文台

• stroboscopic flash source
• stroboscopic interferencer holography
• stroboscopic interferometry
• stroboscopic light sources
• stroboscopic technique
• strobotron
• stroke
• stroke method character generator
• strong absorption
• strong-line approximation
• strong mode
• strontium
• strontium postasium noobate
• strontium tianate
• structure
• structured pulse
• stub
• stub axle
• stub gear tooth
• stud
• stud bolt
• student microprojector
• student microscope
• studio
• stuff