см. тж. при помощи
• These problems have been solved using ( or employing , or by application of ) the Schrodinger equation.
• This is usually accomplished via internal conversion.
• These compounds may be separated by fractional crystallization or through the agency of enzymes.
• Samples are prepared by different methods.
• The levers are operated by ( means of ) precision cams.
• The low-frequency components are attenuated by the use of a coupling capacitor.
• The temperature coefficients were determined through the use of ...
• This is more easily achieved with ( the use of ) inorganic phosphors.
• The readings are made with the help ( or aid ) of a microscope.