重点讲解：
1. up to
高达；多达；
eg. There is usually room to accommodate up to 80 visitors.
那里通常可以住得下80位来客。
eg. Eye-witnesses claimed Mr Melton whipped the horse up to 16 times.
目击证人称梅尔顿先生抽打了这匹马16鞭之多。
2. in the balance
悬而未决；待定；
eg. The fate of civilization, it appeared, hung in the balance.
看起来，这是人类文明生死存亡的关头。
eg. The fate of a project which could revolutionise the use of computers in hospitals hangs in the balance.
可能给医院的计算机使用带来革命的项目仍然前途未明。
3. close to
近的；接近的；
eg. Camp sites are usually situated along the coast, close to beaches.
野营地一般都位于海滨，靠近沙滩。
eg. She insists on diverting to a village close to the airport.
她坚持改道去机场附近的一个村庄。