You could save a vast tract of rainforest, you could feed the starving.

Poaching and invasive species of plants were degrading the area and the state did not want to provide the money to maintain the vast tract.

A vast tract of land was deserted and perhaps 200,000 inhabitants of the neighbouring districts of the lines were relocated inside the lines.

In the last few years, a property developer bought a vast tract of vacant, government land.

In this vast tract of land.... every sort of produce and improvement of which the various soils of the earth are capable, may be expected.

While anatomy of the larynx and vocal tract help make speech physically possible, they aren’t all that’s required.

First, they created a decoder to interpret the recorded brain activity patterns as instructions for moving parts of a virtual vocal tract (including the lips, tongue, jaw and larynx).

Producing turbulence in the vocal tract requires a very careful adjustment: the minimum constriction cross-section must be typically less than 1.5mm, but greater than 0mm.

A hybrid control system of a human vocal tract simulator.

Singers can also learn to project sound in certain ways so that it resonates better within their vocal tract.