The first storm of spring blew fiercely, and the cherry blossom petals fluttered up.

He is a master of Wing Chun.

She used to be a prostitute, but now she has started a new life.

He is just a donkey in a lion's skin, he has no real power.

I use a set square to draw shapes.

In chemistry class, I learned about acid anhydride.

In chemistry class, I learned about acidic oxides.

Lower fatty acids play an important role in the human body.

Essential fatty acids are necessary to be taken from our diet because our body cannot produce them on its own.

Essential amino acids are vital nutrients for the human body.