The acrocephalid warbler is a bird often seen in wetlands.

A mantis flew into the garden.

I used a nail clipper to cut my nails.

This hermit crab can perform autotomy when it senses danger, allowing it to escape from enemies.

When he eats an apple, he uses his incisors to bite it off.

Learning about the existence of Yamatai-koku is very interesting.

He acted according to my instructions one by one.

A skew-symmetric matrix has the characteristic that its transpose matrix is the inverse of the original matrix.

A diagonal matrix is a matrix in which all elements outside the main diagonal are zero.

He is a recent graduate and is still not used to work.