He is doing squats to train his quadriceps femoris muscle.

Please calculate the quartiles of this data set.

This regular tetrahedron is composed of equilateral triangles on all sides.

A day without seeing her feels like an eternity of waiting impatiently.

This univalve has beautiful colors, doesn't it?

His story is a mix of truth and fiction, and I don't know what's true.

This painting is my most precious item under heaven.

My room is on the upper level.

They are treating all students as one.

He tends to regard all people as the same.