• This calculation presents ( or involves ) no difficulties ( or problem ).
• Measuring distances in astronomy has always been a problem .
• This calculation presents ( or involves ) no difficulties ( or problem ).
• Measuring distances in astronomy has always been a problem .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012