• It is ( a ) common practice to carry out a numerical analysis before entering upon an experimental investigation.
• It has become customary to use overall coefficients.
• It is ( a ) common practice to carry out a numerical analysis before entering upon an experimental investigation.
• It has become customary to use overall coefficients.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012