It was rather dull for Margaret after dinner.

玛格丽特晚饭后的生活相当乏味。

The second is guaranteed to look great for about 10 years, whereas the cheaper one will start to dull after around 6 or 7 years.

第二种可以保证在 10 年内（油漆）看起来很好，而便宜的那种在 6、7 年左右就会开始变暗。