Sentence examples for were introduced about from inspiring English sources

Candles were introduced about 5,000 years ago, and gas street lighting was possible beginning in the mid-1700s.

They were introduced about four years ago.

Wireless security systems that can be installed by virtually anyone were introduced about a decade ago.

Ms. Aubourg, 26, also quit shortly after the rules were introduced, about a year after she was hired.

Since the double-decker buses were introduced about a year ago, some drivers have complained about the brakes.

Christie's, long critical of Sotheby's guarantees, which were introduced about 1970, changed its policy in March and guaranteed the five works from the Lehman collection.

The double-coiled filament used today was introduced about 1930.

Direct visualization of viruses became possible after the electron microscope was introduced about 1940.

A simple form of chest of drawers was introduced about 1620.

Until about 2007, a major new technology was introduced about every two years.

It was introduced about a year ago, and we're working very closely with the M.L.S.'s to expand.