The waterfall flows into a mountain river in the middle of the forestThe waterfall flows into a mountain river in the middle of the forest
The surface of the ancient pond was covered with brown mudThe surface of the ancient pond was covered with brown mud
The waterfall flows into the river against the background of autumn treesThe waterfall flows into the river against the background of autumn trees
Стремительно текущая водная масса, река, ручей. Поточное производство ( спец. ). Группа учащихся, с к-рой проводят какие-н. занятия в известной очереди с такими же, подобными группами.