重点讲解：
1. drive up
使上升；抬高；
eg. The growth in demand is certain to drive up the price.
需求的增长一定会使价格升高。
eg. This could drive up the demand for gold.
而这些趋势将导致黄金需求有所上升。
2. the equivalent of
等同物；等值物；对应物；
eg. That dress cost the equivalent of a week's salary.
买那件连衣裙花的钱相当于一个星期的工资。
eg. Breathing such polluted air is the equivalent of smoking ten cigarettes a day.
呼吸这些被污染的空气就相当于一天抽10支烟。
3. open up
开放；开设；开展；
eg. They decided to open up a business in the town.
他们决定在城里开展业务。
eg. They decided to open up the island for cultivation.
他们决定开发这个岛。
4. get hold of
（通常指好不容易）得到，获得；
eg. I'd like to get hold of two tickets for the concert.
我想搞到两张音乐会的票。
eg. If the newspapers get hold of this scandal, they'll really have a field day!
报纸如果能抓住这件丑闻，那可就有机会大做文章了。
5. have no idea
不知道；不了解；
eg. We have no idea how to persuade him to give up the idea.
我们不知道如何说服他放弃这个念头。
eg. I have no idea why he resigned his post.
我不知道他为何辞去他的职务。
