We need to calculate the aggregation number of this compound.

He had a chalcedony ring in his hand.

He is highly regarded in the business industry.

This performance was a great success.

We are planning to give a performance of a new play next week.

He has been engaged in employment at this company for many years.

I am employed at that company.

We need policies to support the promotion of industry in this area.

The government is encouraging the promotion of new industries.

Deep-sea fish have undergone various evolutions due to the harshness of their habitat.