He is good at playing Beethoven's variations.

My younger sister is missing school because of tonsillitis.

Almond oil is indispensable in my skincare routine.

I use bitter almond oil dissolved in water for skin care.

He is the editor in chief of this magazine.

This rock is a type called greenschist.

This greenschist is geologically very interesting.

For some reason, I can't convert this sentence.

Hentriacontane is a type of alkane in organic chemistry.

He worked all night to find the solution to the partial differential equation.