Перевод профессионально

focus
– 
фокус
, 
plus
– 
плюс
, 
diode
- 
диод
. In some cases there are parallel 
forms in Russian: one formed by transcription (a loan-word) and the 
other which is usually a native word, e.g.: 
эквивалентность 
and 
равенство
;
 
баланс
and
 
равновесие
;
 
резистор 
and 
сопротивление
; 
бустер
and 
ускоритель
; 
индустрия
and 
промышленность
, 
installation
– 
инсталляция
and 
установка
. The 
correct choice is absolutely necessary in this case.
Translators make their choice considering whether the source text is 
highly technical or not, because a borrowed term is usually more familiar 
to specialists than to laymen. Translators have also to take into 
consideration the possible differences between the two forms in the way 
they are used in the target language. For example, the Russian word 
индустрия
is restricted in usage and somewhat old-fashioned. 
Much attention is paid to the systematic character of new words. In 
many fields there are special rules of terms‟ formation to denote 
concepts and objects of a particular class. For instance, the names of 
different kinds of electron tubes are formed by analogy with the term 
electrode
indicating the number of electrodes used in the tube (
diode
, 
triode
, 
tetrode
, 
pentode
, 
hexode
, 
heptode
, etc.); a number of special 
electronic devices have the element 
-tron
in their sructure (