The book is a practical manual on the translation of scientific and technical literature from Russian into English and from English into Russian. The main purpose of the manual is to help you choose the correct English equivalent of an ambiguous Russian term when translating. The manual consists of sections: the main part, exercises and the key to exercises. The main part is presented in the form of a dictionary; the second section includes a system of exercises to help you learn, work out and reinforce the correctness of the use of English equivalents of Russian terms in various contexts. The key to exercise is the possibility of self-testing.