Objectives A.To learn the purposes and functions of non-tariff barriers; B. To grasp the main idea and the structure of the text; To master the usage of key special terms, words and phrases in this chapter; D To conduct a series of listening,speaking, reading,writing and translating activities concerned with the theme of the chapter. 制尔香行質易大孝 15Objectives Objectives A.To learn the purposes and functions of To learn the purposes and functions of non -tariff barriers; tariff barriers; B.To grasp the main idea and the structure of To grasp the main idea and the structure of the text; the text; C.To master the usage of key special terms, To master the usage of key special terms, words and phrases in this chapter; words and phrases in this chapter; D. To conduct a series of listening, speaking, reading, writing and translating activities concerned with the theme of the chapter