VOA慢速英语:日本祖母级老太太证明学习从不嫌晚

grandmother – n. the mother of your father or mother

great-grandmother -- n. the mother of one's grandmother or grandfather.

granddaughter -- n. a daughter of your son or daughter

phrase -- n. a group of two or more words that express a single idea but do not usually form a complete sentence; a brief expression that is commonly used

challenge -- n. a difficult task or problem : something that is hard to do

global -- adj. involving the entire world