The incorporation of the pupils to the laboral activities traces very complex problems, specially didactical ones, because it implies the rational and harmonic al integration of the pupils activities, as students as well as teachers.

Let the weight W […] be kept in equilibrio by the power P, through the mediums of the pulleys […]

The ship changed its course 15 degrees towards south.

The NRA is pumping groundwater into the River Itchen in Hampshire to keep up its flow and is trying to save three streams, the Tong, the Little Stour and the Dour from going dry this summer.