canonical transformation
正则变换

• sharp focusing
• sharp height
• sharp line spectra
• sharpness
• sharpness definition
• sharpness in depth
• sharp-nosed
• sharp pulse
• sharp series
• sharp wave
• shaving
• shear deformation
• shear elastic wave
• shearing interferometer
• shearing strain
• shearing stress
• shear ratio
• shears
• shear-wave
• sheath
• sheathed ruby
• sheathe tube
• sheave
• sheer pin
• sheet cathode