Are certain portions of the person's career particularly important to the current situation?

This support, however, still requires a certain portion of that produce.

A certain portion of me was so filled that I thought it might burst.

When two objects touch, a certain portion of their surface areas will be in contact with each other.

I opened to him a certain portion of my memory, stepped aside.

Or at least the cultural take of a certain portion of the country.

Certain portions of the film were singled out for praise.

Often, the results from the simulation reflect a certain portion of the grade.

In addition, certain portions of the instructional copy are changed slightly.

Mountain bikes are permitted in certain portions of the park.