Введение в теорию и практику перевода (на материале английского языка) - стр. 4

It does not mean, of course, that we cannot express the difference between a hand and an arm in Russian or that English speaking people do not see any difference between a leaf bud and a blossom bud. They do, but traditionally some aspects of reality are reflected as differentiated notions in the mind of one people and as undifferentiated notion in the mind of another people. Theoretically speaking, every language can express everything, but it differs from other languages in what it should express.

This group of words demands special attention because it often causes trouble in the process of translation (for instance, try to translate the following sentence into Russian: "They both married their cousins").

In all the cases when the meanings of words coincide partially there arises a problem of choosing the right variant of translation. This choice should be based on two factors: on the knowledge of possible semantic relations between the words of SL and TL and on the information derived from the context.

III. Finally, in one of the languages there may exist words which have no correspondences in the other language at all (безэквивалентная лексика). They are usually proper names not used or even known in other countries (personal names such as Aubrey, Hope, Игорь, Галина, etc.; place-names such as Hindley, Catmose, Молитовка, Урень, etc.), and names of specifically national notions and phenomena (such as muffin, drugstore, startup, самовар, щи, агитбригада, стройотрядовец, etc.).

The meaning of equivalents practically does not depend on the context, so to translate them one should merely look them up in a dictionary. The demand to consult dictionaries is essential. No guesswork is allowed in translation: a word should be either known or looked up; otherwise there is always a risk of translation the word "data" as "дата" or "billet" as "билет" or writing some other nonsense of the kind.

It is much more difficult to translate those words of SL that are characterized by partial correspondence to the words of TL. Such words are mostly polysemantic. That is why in order to translate them correctly it is necessary first of all to state which particular meaning of such a word is realized in the utterance. The most reliable indicator in this case is the context in which the word is used.

They usually differentiate between linguistic context and extralinguistic context (or context of situation). Linguistic context in its turn is subdivided into narrow (context of a phrase or a sentence) and wide (utterance-length context or sometimes context of the whole text). Very often the meaning of a word is revealed in the minimum context, i.e. in a phrase ("green" – зеленый, юный, незрелый, etc., but there is no problem in translating the phrase "green trees" – "зеленые деревья" or "green years" – "юные годы"). However, there are such cases when we need at least a sentence to see what the word means, e.g. "I’ll be sitting in the 3rd carriage from the front of the train" – "Я буду в третьем вагоне от начала поезда". The whole sentence is necessary here to understand the meaning of the word "carriage" and to choose the variant "вагон" but not "экипаж, повозка".