a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
同义词：calciumatomic number 20
a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes
同义词：CaliforniaGolden StateCalif.
英汉双解大词典
ca
1.
the INTERNET DOMAIN NAME for（）
the INTERNET DOMAIN NAME forCanada 加拿大