см. тж. бывает ; если это так ; наблюдаться ; происходить ; существовать
• The minimum value of t d occurs when Eqs. (3-7 b ) and (3-7 c ) are equal.
• A similar situation exists ( or prevails , or obtains , or takes place ) with regard to the total content of ...
• Under certain conditions this actually is the case .
• This is not always the case .
• These ultraviolet effects occur at about 0.3 μ.
• The year 1959 saw a marked improvement in the world freight position.
• The last quarter of the year showed a sharp increase in ...
• A similar relation holds for the frequency of the heart beat.
• The following relationships are true ( or hold true , or hold good , or hold , or are valid ).
• Mass transfer is involved whenever a chemical reaction takes place.
• The last few years have seen the first steps into the new territory of ...
• At low pressures, second-order kinetics obtain .
• Equation (8.1) holds throughout the flow.
• Such a reaction occurs not only with aldose but also with ketose sugars.