21.   For some, the amounts underscore the vulnerability of economies that have grown dependent on the constant flows of legal and illegal immigration to the United States.

22.   He recalls a constant flow of celebrities and politicians.

23.   In areas where corporate transfers mean a constant flow of new faces, the parties help neighbors connect.

24.   Instead of one big pipe carrying a constant flow of data, why not build many smaller pipes to carry data a bucket at a time?

25.   Jackhammers and clanging steel echo through construction sites, bright signs light the street and the constant flow of people, add to the vitality of this bustling area.

26.   Many lodges here thrive on the constant flow of prospective members who bring the old traditions and zeal.

27.   Nutrients are carried in a constant flow of water.

28.   On the opening night of every Broadway musical, a constant flow of flowers, balloons and gifts swirls past the stage door and into the theater.

29.   On the opposite shore, there is a constant flow of modern ships to oil terminals and container piers.

30.   Once residents came to know their officers and met regularly with them, they began providing a constant flow of tips.