例句：

　　We all felt (that) we were unlucky to lose.

　　我們都認為我們輸了是運氣不好。

　　Thirteen is often considered an unlucky number.

　　十三常被認為是不吉利的數字。

　　Some people think it's unlucky to walk under a ladder.

　　有些人認為從梯子下面走過(guò)不吉利。