It's hard to talk with a hoarse voice from a cold.

He is good at singing songs in head voice.

There is an old legend in this village.

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

I boiled water using the '爨'.

There are many rice plants growing in the paddy field.

Mr. Tan is my best friend.

She used an ornamental hairpin to decorate her hair.

Electromagnetic waves propagate at the speed of light.

Aden is a beautiful city in Yemen.