As soon as he arrived, he said 'I just got here.'

In linear algebra, triangular matrices play a very important role.

A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.

The crescent moon is floating in the sky, it's very beautiful.

She has been engaged in the weaving industry for many years.

Her family has been in the textile industry for many years.

He lost his temper because the waiting time was too long.

He is accumulating good deeds almost every day.

He is suffering now because of his past bad deeds.

The manufacturing industry occupies an important part of the economy.