Уже несколько лет он работает над д

Уже несколько лет он работает над двигателем
Существует специальная отрасль науки , которая предсказывает будущее

Results (English) 1:

For several years he was working on the engine there is a special branch of science
, which predicts the future

Results (English) 2:

For several years he worked on the engine
There is a special branch of science that predicts the future

Results (English) 3:

For several years now he is working on the engine
there is a special branch of science , which predicts the future