that is why的用法和樣例：
例句
- That is why everything is becoming meaningless.
這就是為什么一切都變得愈來(lái)愈沒(méi)有意義了。 - I got up late, that's why I missed the bus.
我起床遲了，這就是為什么我沒(méi)趕上汽車(chē)。 - He has so few friends that his life is lonely.
他的朋友很少，因此他的生活非常孤單。 - She's not feeling well and is staying in the dorm.
她感覺(jué)不舒服，因此呆在宿舍里。
