*文末有拓展，记得看完！ 这三个单词都是“ 话题/主题”的意思，它们有什么联系和区别呢？我们先来感悟一段话： The subjectof this class is MATHS. Today we are talking about ALGEBRA (theme), and we'll start by learning SIMPLE MATH EXPRESSIONS (topic).

2017年1月18日，国家主席习近平在瑞士日内瓦的联合国万国宫发表主旨演讲，系统阐述构建人类命运共同体重要理念，对全世界面临的挑战和问题提出中国理念、中国方案。 On Jan 18, 2017, President Xi Jinping explained his vision of building a community with a shared future for mankind in ...