This biennial plant matures and blooms over the course of two years.

The students on a field trip visited the museum.

He was hiding the fact that he was an illegitimate child.

The ecosystem of zoobenthos is an important field of study in marine biology.

The study of benthos is an important field in marine biology.

Phytobenthos is an important part of the marine ecosystem.

He pulled the door open.

He flipped the pages of the book.

He won in Mahjong with the Yakuman hand of Suuankou Tanki Machi, and the number of Han was 13.

He is suffering from lovesickness.