adj.推定的；推論的

n.引入語；推導語

Roughness of the skin can be caused by bad diet. 飲食不好可能引起皮膚粗糙。

The bad news dampened our spirits. 這惡耗使得我們精神沮喪。

The incident put her in a bad mood. 這件事使她心情很不好。

It's a bad habit for a boy to toss off. 對一個男孩來說，手淫是個壞習慣。

One bad deed can blemish a good reputation. 一次不良的行為可損害好的名聲。

Children's bad behavior is often a reflection on their parents. 小孩的壞品行常常有損父母的名譽。