I
см. тж. в результате чего получаем ; извлекать ; можно получить ; обеспечивать путём ; приобретать
• Several methods were used to arrive at an estimate of earth age.
• Van der Waals' equation is arrived at ( or deduced , or derived ) by assuming that ...
• Additional resolution can be gained by using ...
• You can substitute ... and come up with a true equality.
• This value is found ( or obtained ) from the eigenvalue equation.
• To secure information on ...
• Related equations can be worked out in the same way.
• From (A3) we have ( or get , or obtain ) : ...
II
• The natural dyestuffs are derived from plants or animals.
• By drilling hundreds of holes they recovered 50,000 core samples.
• They were able to secure about a 20% yield of ...
• Bromate may be formed from bromide electrolytically.
• The operating pulses could be derived ( or obtained ) from a contact breaker.
• A more uniform production of acetylene gas that can be had from the untreated calcium carbide ...
• In that period, many antibiotics were isolated in pure form.
• Ammonium chloride is made ( or prepared , or produced , or obtained ) by absorbing ammonia in hydrochloric acid.
• The weight of ... is derived from the ratio of ...