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.

We had a picnic on the left bank of the river.

He is going to the hospital for cancer treatment.

I saw a flock of wild geese in the park.

His face is very expressive.

He stubbornly refused to change his opinion.