It takes time to introduce the development of new products.

He is a famous criminologist and has written many books on crime.

We are planning a campaign for the sales promotion of the new product.

The coefficient of restitution of this ball is 0.8.

Since he is always laughing, it can be said that 'fortune comes in by a merry gate'.

My grandfather always says 'Obey your children when you get old,' and respects our opinions.

Just as the phrase 'look before you leap' suggests, he prepared everything in advance.

What is this, that box?

Countries located in the Eastern Hemisphere have diverse cultures and histories.

He has perfectly mastered the Received Pronunciation of English.