Australia is an unicameral country.

澳大利亚是一院制的国家。

The unicameral parliament has 25 seats and members elected by popular vote to serve five-year terms.

单一议院的国会有25个席位，由民众投票产生，任期5年。

When the first congress was held in 1774, Congress was still unicameral, meaning that it had only one part or group of legislators.

1774年第一届国会召开时，国会仍然是单院制，意思是它只有一部分或一组立法者。