由于伞最初是用来遮蔽太阳光的，因此在室内打开伞就是对太阳的侮辱，这样会给住在屋里的人带来坏运气。

Since the umbrella was first used to protect a person from the sun, it is an insult to the sun to open an umbrella indoors. To do so will bring bad luck to anyone who lives in the house.

youdao

由于伞最初是用来遮蔽太阳光的，因此在室内打开伞就是对太阳的侮辱，这样会给住在屋里的人带来坏运气。

Since the umbrella was first used to protect a person from the sun, it is an insult to the sun to open an umbrella indoors. To do so will bring bad luck to anyone who lives in the house.

youdao