It is necessary, for many reasons, that the revision of our national strategy should take time.

These revisions took place during 1998 with the changes being visible in the graduating classes of 1999.

Historical research was performed over the next two years, and extensive revision took place in 1982/83.

Even in public libraries, remarkably little stock revision takes place.

Among other things, the revisions took into account the falling prices of computers, more than in the past.

But for the most part, revisions are taking place at the local level.

The revision took ten more years before it was ready for publication.

The 2005 revision took a few steps in the right direction.

The first revision of the work took place in the second half of 1893.

The revisions took the better part of an hour.