они слонялись по парку, и было ясно

они слонялись по парку, и было ясно, что им нечем заняться.

Результаты (английский) 1:

they roamed through the Park, and it was clear that they have nothing to do.

Результаты (английский) 2:

they wandered through the park, and it was clear that they have nothing to do.

Результаты (английский) 3:

they hung out in the park, and it was clear that they have nothing to do.