商业电视严重依赖广告收入。

___Commercial television relies heavily on advertising revenue.

在商业广播中，广告全天频繁播放。

In ___commercial broadcasting, advertisements are shown frequently throughout the day.

这个频道完全是商业性的，因此会用许多广告中断节目。

The channel is entirely ___commercial, so it interrupts programmes with many ads.