The president called for a greater emphasis on math and science education in a speech to the National Academy of Sciences in April.
VOA: standard.2009.11.24
Do you like the zoo and the Academy of Science?
你喜欢动物园和科学院吗?
溺爱女儿的父亲 - SpeakingMax英语口语达人
应用推荐
模块上移
模块下移
不移动