I have yet to see any significant activity in this regard.

White water rafting is a significant activity in the department.

There are other significant activities carried out in the port.

There is no significant industrial activity in the village now.

For the first time in her life, what she was doing was the most significant activity of the group.

Tourism is now the most significant economic activity on the island.

Its first contract in 1970 eventually developed into a significant activity.

In the past, fishing was a significant activity but this aspect of the economy is small now.

It is a small city with no significant industrial activity.

However during his 11-year long exile he was unable to further any significant political activity.