gravitational force
(1)引力
(2)重力

• xenon pulsed light source
• xenon search light
• xenon short-arc lamp
• xenon tube
• Xenon /Xenon Flashlamps Light Sources
• xerography
• xeroradiography
• xerox
• X-flash
• xi-jhyperon
• X-line
• X-parallax
• X-radiation
• X-radioray
• X-ray
• X-ray crystal analysis
• X-ray crystallography
• X-ray detectoscopy
• X-ray diffraction
• X-ray diffraction camera
• X-ray diffraction contrast
• X-ray diffractogram
• X-ray diffractometer
• X-ray diffractometry
• X-ray emission spectrum