VOA慢速英语:Worry Over New African Union's Chairman, Robert Mugabe

imperialist – n. a powerful country or group of countries that attempts to change or influence the way people live in other, poorer countries

sanction – n. an action that is taken or an order that is given to force a country to obey international laws by limiting or stopping trade with that country, by not permitting economic aid for that country, etc.

qualm – n. a feeling of doubt or uncertainty about whether you are doing the right thing

unity – n. the state of being in full agreement

memory – n. the power or process of remembering what has been learned