This alone demonstrates that the television business is not an easy world to survive in, a fact underlined by statistics that show that out of eighty European television networks no less than 50% took a loss in 1989.

【重点词汇】demonstrate 表明，说明 survive 艰难生存 underline强调，突显 statistics 数据

【结构分析】句子主干：This alone demonstrates that...其中that引导宾语从句

修饰成分，在主句中，to survive in为to do不定式作定语修饰world;a fact...为同位语解释说明前面的句子;underlined by statistics为v-ed形式作后置定语修饰a fact; that show that out of eighty European television networks no less than 50% took a loss in 1989为从句的嵌套，定语从句中包含一个宾语从句，在宾语从句中， no less than 50%作主语，took为谓语动词，a loss为宾语，out of eighty European television networks作状语。