4/ A public key can be shared with other parties and is used for receiving transactions, similar to an account number. A wallet address is a hashed version of this public key. A private key is the wallet owner's key and is used for authorizing transactions, like a PIN.
4/公钥可以与其他方共享，并用于接收交易，类似于帐号。钱包地址是该公钥的哈希版本。私钥是钱包所有者的密钥，用于授权交易，如PIN。