Nitrogen makes up about 78% of the Earth's atmosphere.

I boiled water using the '爨'.

There is an old legend in this village.

Mr. Tan is my best friend.

There are many rice plants growing in the paddy field.

She used an ornamental hairpin to decorate her hair.

The greater the electric potential difference, the faster the current flows.

The chemist electrolyzed water to produce hydrogen and oxygen.

We conducted an experiment on electrolysis in chemistry class.

My landline phone broke down recently.