慢速英语:Free Wi-Fi Is Coming to New York City(翻译)

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1. replace vt.代替; 替换; 把…放回原位
例句：We undertake to replace any product not up to the specifications.
产品不合规格，保证退换。

2. maintain vt. 保持; 保养; 坚持; 固执己见
例句：Utility companies could install and maintain them.
公用事业公司可以安装并保养它们。

3. suspicious adj.可疑的; 猜疑的，怀疑的
例句：She got suspicious and decided to get to the bottom of it.
她起了疑惑, 便决定弄个水落石出。

4. increase vt.增加，增大，增多
例句：He exhorted his workers to increase production.
他力劝自己的工人增加生产。