I was unpleasantly surprised to discover that I couldn't find my keys.我惊讶地发现我找不到钥匙了，心里非常不快。

The juice was unpleasantly sour.这果汁酸得难以下咽。

Our vacation started unpleasantly with long delays and bad weather.我们那次假期在长时间的延误和糟糕的天气中不愉快地开始了。