21.   China has enough foreign exchange to defend its currency, and its relatively closed financial system makes speculation against the currency difficult.

22.   For its part, China expects to expand the market for its own export industries while maintaining the dichotomy between an open economy and a closed political system.

23.   Has this apostle of closed systems finally gotten religion?

24.   Idol worship to Ms. Ozick means the worship of art rather than God, or any closed system.

25.   If PDR becomes competitive politically, the closed system that has protected PRI wrongdoing will at last be vulnerable to public scrutiny and voter pressure to redress injustice.

26.   Illegal immigrant rings tend to operate within their closed cultural systems, like the Mexican networks placing trinket-sellers in New York and California.

27.   In a closed political system, the only available outlet for criticism of government policies and corruption is Islamic fundamentalism.

28.   Indonesians have also become impatient with a closed political system that for years allowed only two tame opposition parties.

29.   Instead, mainStreet provides access to a closed system of copies of Web sites, most of which are drawn from local schools, libraries and municipalities.

30.   It must return to its old closed system of electing delegates or it risks having them not seated.