adj.可叹的；可惜的；遗憾的
His decision to marry her is more regrettable. 他决定娶她是很不幸的。
It's regrettable that you diddled away the whole afternoon. 真可惜，你把整个下午浪费掉了。
It is regrettable that few people shall walk today because of the development of traffic facilities. 由于交通设施的发展，现在很少人愿意步行，这是很可惜的。
It is regrettable that we never speak seriously. 遗憾的是我们从没认真谈过。
He should be regretful for his regrettable conduct. 他因该为自己那令人遗憾的行为而感到后悔。
