Interrupting an opera on television for a pet-food commercial is going from the sublime to the ridiculous.
在电视播演歌剧时插播宠物食品广告真是煞风景.
commercial television is an effective medium for advertising.
商业电视是有效的广告宣传工具.
Is commercial correspondence taught at the school?
学校里是否教授商业函件?
