重点讲解：
1. in need of 有…的需要；有…的必要；
Many of the buildings are in need of repair.
许多建筑需要整修。
2. be subject to 受…支配的；服从于…的；
The competitors will be subject to random drug testing.
参赛者将要接受随机药检。
3. account for （数量或比例上）占；
Asia accounts for about 40% of New Zealand's total exports.
在新西兰的出口总额中，亚洲区占了约40%。
4. as of 在…时；从…起；自…始；
As of the end of 2005, the United States home sales set record highs for five consecutive years, prices have continued to rise.
截至2005年底，美国住房销售量连续五年创下历史新高，价格也不断上涨。