我有一串钥匙用英文怎么说

"a string of keys" 是英文中表示"一串钥匙"的说法。

"String"在这里是指一串，意思是一连串的东西，而"keys"是指钥匙。

例句1:

He pulled a string of keys out of his pocket.

他从口袋里掏出一串钥匙。

例句2:

She had a string of keys hanging from her belt.

她的腰带上挂着一串钥匙。