评论
打印
重点讲解：
1.keep track of 追踪；记录
例句：However, the local switch can only keep track of its own local numbers local numbers.
不过，本地开关只能记录其本地号码。
2.once in a decade 十年一遇
例句：Flying to Europe will come once in a decade rather than once every year or two.
飞去欧洲旅行将不是一年或两年一次，而是十年一遇。
3.seal the deal 达成协议
例句：The administration sent Ellen O.Tauscher, the undersecretary of state for arms control, to Geneva to help seal the deal, they said.
他们说，政府已派国家军备控制副部长艾伦去日内瓦协助达成协议。
4.come on board 入伙；合作
例句："First he told me it was a stupid idea,and then he agreed to come on board. "
一开始他告诉我这个想法真愚蠢，后来他才答应一起合作。
