This command takes many options, but its basic use is fairly simple: Pass it the create parameter, the -f FMT parameter to set the format, the filename, and the size of the image.

该命令有很多选项，但基本使用相当简单：传递给它create参数、- f fmt参数来设置格式、文件名和镜像大小。

youdao

The role of unpack is to unpack the string (presumably packed by pack(fmt, ...)) according to the given format.

Unpack 的任务是根据给定的格式对字符串进行拆包（假设由 pack(fmt, ...) 进行包装）。

youdao

The string must contain exactly the amount of data required by the format: len(string) must equal calcsize(fmt).

字符串必须含有格式所需的确切数据量：len(string) 必须等于 calcsize(fmt)。

youdao