重点讲解：
1. in total 总共；总计；
例句：I put the weight at four pounds in total.
我猜总重量是四磅。
2. prevent sb. from doing sth. 阻止；制止；阻碍；
例句：We must at all costs prevent them from finding out about the plan.
我们无论如何不能让他们探知这个计划。
3. ahead of 早于；在…之前；
例句：The merger rumors are partly wishful thinking, and partially a way for seasoned traders to get ahead of the next big stock jump.
并购传言是一种主观愿望，也是经验老道的交易员赶在下一轮股市大涨前做好准备的手段之一。
4. incorporate into 把…合并；使并入；
例句：We should incorporate more technology into the new design.
我们在新的设计中应该加入更多的科技原素。
