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1. We know the geological prospecting to be developing now.
2. Decreasing of volumes of oil extraction is said to continue till 1996.
3. Samotlorskoye deposit is known to be one of the top ten largest deposits of the world concerning oil reserves.
4. We know the existence of oil and gas resources in Siberia to have been predicted by I.M. Gubkin in 1934.
5. We know a laser to be a device that stimulates the electrons of a light-producing material to vibrate simultaneously.
6. Lasers are known to have found an application in the printing industry.
7. Light waves are now believed to be due to the motions of electrons themselves within the atoms.
8. Chemical investigations have shown each element to combine with another only in definite proportions. Химические исследования показали что каждый элемент, объединяется с другим только в определенных пропорциях.
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1. If this article were on radio-electronics we should read it without dictionary.
2. It would have been impossible to launch space rockets, if we had not had the necessary polymeric materials and synthetic fuels.
3. If oil is found in a region, the oil extractive and oil processing enterprises are created.
4. If liquids expand upon freezing, an increase of pressure lowers the freezing point.
5. If the metal had been heated slowly, the first changes in its appearance would have occurred at a temperature of 1000 К.
6. It would be impossible to determine the properties of these materials without intensive studies in our research laboratory.
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