短语词组短语type in a keyword 键入一个关键字;键入关键字;输入主题词;打入一个关键字type of a constant 常数类型Siren Type -A 赛连A型type -A waves A型波USB Type -A 标准接口blood type was a a 型血type of a subspace 子空间的类型 返回 Type A