It is believed that black dwarfs are formed by the cooling of white dwarfs.

The Republic of China is the official name of Taiwan.

He was the first foreigner to be promoted to yokozuna.

I saw a jackdaw in the park.

The International System of Units is the standard measurement system used by scientists all over the world.

The number of nuclear-armed countries is increasing worldwide.

I do my laundry at the laundromat every Saturday.

My dream is to visit the Republic of South Africa.

I plan to go to the national museum this weekend.

The Yemen Arab Republic is a country located in the Middle East.