In the old days, antitrust laws kept monopolies from buying potential competitors.

过去，反垄断法禁止垄断大户收购其潜在竞争者。

2.range 范围

The article covered a wide range of topics.

这篇文章讨论了一系列广泛的论题。

3.exchange 交换

Shares soared on the New York stock exchange.

纽约证券交易所股票暴涨。

4.vsimilar 相似的

They have uncannily similar voices.

他们有着出奇相似的嗓音。