The Gates Foundation announced that these cities had to «commit to replicating high - performing models of traditional and charter public schools while improving or closing down» lousy schools, and that participating locales were pledging to address «contentious and persistent tensions between district and charter schools.» (educationnext.org)
«But the U.S. - China economic relationship will be marked by persistent tensions that increasingly center on technology rivalry and investment restrictions.» (cnbc.com)
Persistent tensions within the coalition were highlighted only yesterday when Lib Dem Business Secretary Vince Cable attacked plans for a cap on non-EU immigration - a measure included in the parties» agreement at the insistence of the Tories. (channel4.com)