Return the data as a string containing the raw data, (e.g., 2 bytes per sample in big-endian byte order (high byte, low byte) if you have set the sample width to 2 bytes).

• 传回代表原始数据的字符串，(例如；如你设定取样宽度为两个位元的话；则每个样本以双字元大顺位次序存放(高字元；低字元)).