так как это очень важная и ответств

так как это очень важная и ответственная работа, потому что развития отношений между различными народами во многом зависит от него

Результаты (английский) 1:

because this is a very important and responsible work, because of the development of relations between different peoples largely dependent on it

Результаты (английский) 2:

as this is a very important and responsible work, because the development of relations between the various peoples depends on it

Результаты (английский) 3:

As this is a very important and responsible work, because the development of the relationship between the various peoples largely depends on it