例句:We have all witnessed the power of social media.
我们见证了社交媒体的实力。

2.drive out 驱赶

例句:He cut his rates to drive out rivals.
他降低价格以便挤走竞争对手。 

3.held out 伸出；提出

例句:He held out a small bag tied with string.
他拿出一个系着细绳的小袋子

4.Not long ago 不久前

例句:Not long ago, he was seriously ill.
前不久，他害了一场大病。