The ampersand identifies the parameter as the holder of a code block.
该符号将参数识别为代码块的持有者。
The response is in binary that holds a string representing the credit score that corresponds to the holder of the account number specific as the parameter.
响应是一个二进制字符串，它将与帐号容器对应的信用得分表示为参数。
Support for out and inout parameter passing modes requires the use of additional holder classes.
要支持out和inout的参数传递模式需要另外使用holder类。
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