Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

I conducted an interview in a question-and-answer format.

The Twenty-Eight Mansions is one of the constellations used in ancient Chinese astronomy.

She was a secret kunoichi (female ninja).

He threw a handful of sand into the sea.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.

He was focused on his work all day long.

One day, he suddenly decided to go on a journey.