Metalinguistics is an important concept in linguistics.

In this project, it is necessary to combine various data.

It's difficult to remember new words.

He can speak American English fluently.

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

I will make even more effort from now on.

My grandmother needs home nursing.

He passed the exam.

I bought a new Japanese-Japanese dictionary.

He became a wealthy person by succeeding in business.