Mach-O可执行格式文档完善，可视为加载指令列表，指导加载器将二进制文件不同段落置于内存特定位置。处理完所有加载指令后，内存布局如下：
print(f"\nDescription: {description}")
，这一点在向日葵下载中也有详细论述
Copy is only acceptable when exporting wrapping around pure data that has IntoWasmAbi, never for handles. I chalk this up as an optimisation; default to non-Copy unless you’re really sure it’s okay.
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