This shape is a parallelogram.

He is an excellent arranger, and has produced many musical works.

The calculus of variations is a branch of mathematics that deals with the optimization of functions.

He is good at playing Beethoven's variations.

The amygdala is a part of the brain that controls our emotions.

Almond oil is indispensable in my skincare routine.

This medicine contains bitter almond oil dissolved in water, and it tastes bitter.

I have been studying Japanese for three months.

Sanichi is my best friend.

In response to her help, he said 'Thank you'.