Good television actors have (or use) just enough range to produce a highly artificial version of naturalistic speech.

It may be hard for real trees to compete as artificial versions become more convincing and less expensive.

Both are forms of beta interferon, an artificial version of a natural substance made by the immune system.

Here, as elsewhere, Jensen fashioned his own idealized - and artificial - version of the prairie.

The oil from these roots is believed to be carcinogenic so artificial versions are generally used instead.

This was done by adding various materials together to make an artificial version of natural cement.

From about 1821 the artificial versions became more popular as improved versions could be made and the product was more consistent.

It is also able to create Pattern ghosts, artificial versions of any person who has walked the Pattern.

Full-sized, artificial versions are also commonly found in North America and Europe.

During the surgery, doctors replaced Stram's main heart valve with an artificial version.