He can speak American English fluently.

Our company was able to succeed in a big project by federating with other small companies.

People from all over the country gathered to celebrate the emperor's birth.

We need to combine our forces to make this project successful.

That plan is based on rational thinking.

Please research the interaction between these two drugs.

An old person was playing with his grandchild in the park.

Our school's motto is 'Knowledge is power.'

This animal is a protected species, so you must never touch it.

Using abbreviations makes the sentence shorter.