求翻译：在仔细研究教材和分析学生的心理和生理特点的基础上，我认为本课重点是掌握有关购物的句型：如How about this pair? Are they nice? How much are they? They are　 yuan.等价格的复数表达法。难点是A pair of …for… 中for的含义;What size? size的发音;We’ll take them. them 的发音以及理解这句话的含义。是什么意思？

After careful study of teaching materials and on the basis of analysis of the physiological and psychological characteristics of students, I think that this lesson focuses on knowledge about shopping sentence: How about this pair? Are they nice? How much are they? They are Yuan. plural expressions of such prices. Difficulties are a pair of SB for sth For meaning; What size? Pronunciation of size; We’ll take them. Pronunciation of them, and understand the meaning of this sentence.