文档介绍：Unit 4 para 5-6 words mainland n. 大陆(the ~) = the main area of land of a country Hong Kong constitutes a critical economic gateway between the mainland and the outside world. 香港是大陆和外部世界的一个重要的经济门户。? infrastructure n. 基础设施[C] the basic systems and structures that a country or organization needs in order to work properly More money is needed to strengthen the country's infrastructure. 需要更多的钱加强国家的基础设施建设。? superhighway n. 高速公路[C] a large, wide road on which trafic travels at high speed I got onto the superhighway and drove as fast as I could. 我上了这条高速公路,以尽可能快的速度驾驶。?provincial a. 省的;省级的[C] of a province Anhui Dailyis a provincial newspaper. 《安徽日报》是一份地方性的报纸.?log vt 记录 v 伐木|vt| make an oficial record of events, facts, etc. 记录 The old plane had logged hundreds of hours of flying time. 那架老飞机已经积累了数百小时的飞行记录 |v| cut down trees 伐木 The forest has been so heavily logged that it is in danger of disappearing. 森林被严重砍伐,面临毁灭的危险。? invest 投资|v. |spend money on sth. in the hope of making a proit They will invest 5 million in the project. 他们将为这个项目投资 500 万。? investor n. 投资者[C] sb. who gives money to pany, business, or bank in order to get a proit A New York investor offered to acquire pany's shares for $13 each. 一名