比赛最后关头，后卫不慎踢进了乌龙球，导致球队输掉了比赛。

In the final moments of the game, the defender accidentally scored an ___own goal, causing his team to lose.

她本想帮朋友说话，结果却因为言辞不当而帮了倒忙。

She tried to defend her friend but ended up scoring an ___own goal by using inappropriate words.