Its color standard, set in 1991, is simply that the engineer have "the ability to recognize and distinguish between the colors of signals."

The exact number of species is debated, but most recent authorities recognize between 30 and 40.

Before Lauren answered, she recognized the change in status between the two of them.

Consequently the number of valid subspecies is disputed, with various authorities recognizing between 11 and 15.

The number of species is highly disputed, with various sources recognizing between 50 and about 300.

It is important to recognise the difference between a framework document and an actual contract (of employment or for services).

I had thought that it would be exceptional for people to recognize such a direct connection between population pressure and killings.

The meeting recognised no borders between countries or between people.

It had happened in a section of the world he recognized as Siberia, between ten and a hundred thousand years ago.