com-, 强调。-merc, 经商，商业，词源同market, merchandise.

1. There has always been a difference between community radio and commercial radio.

社区广播电台和商业广播电台一直是有区别的。

2. Attacks were reported on police, vehicles and commercial premises.

据报道，警察、车辆和商业经营场所均遭到袭击。

3. British Rail has indeed become more commercial over the past decade.

过去10年来，英国铁路确实变得更加商业化了。

4. The company laid off 65,000 workers after commercial-jet orders dried up.

商务飞机订单减少后公司精减了65,000名工人。

5. They are the leading manufacturer in both defence and commercial products.

在军工产品和民用产品的制造方面，他们都处于领先地位。