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

According to the law on specified alien species, the import of certain organisms is prohibited.

He has gephyrophobia, and is afraid of crossing bridges.

He entered the room trembling with fear.

Let's cherish every encounter with the spirit of 'once in a lifetime'.

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.

This factory strictly controls the emission of hydrogen sulphide.

The troposphere is the lowest part of the Earth's atmosphere, and most of the weather occurs here.