This room is too dirty to feel like cleaning.

He attended a class on dissection.

He dissected a frog in his biology class.

Japan's coastal defense plays a very important role.

He opened his mouth in surprise.

I found a spider starfish on the seabed.

I am majoring in anatomy at university.

He threatened me to reveal the secret.

He compelled me to do the job against my will.

He climbed the mountain alone to escape from the pressure.