The 1980's was a decade of crucial developments in Mr. Lay's life.

It was however only one of a number of crucial developments.

Despite those lingering disputes, the draft was generally accepted as a crucial development for a union eager to exert more influence in the world.

This was a crucial development in the theory of formal languages.

The change to an oxygen-rich atmosphere was a crucial development.

A second crucial development was the discovery that nerve cells are spontaneously electrically active.

That was a crucial development in the story of how the manufacturing zones changed character.

Major improvement to transport and communication systems brought crucial developments.

It is a crucial development following last year's Action Plan of concrete measures identifying obstacles to mobility.

The constitutional issue was at the center of the week's crucial developments.