System menu appears on ALT-Space 空格显示系统菜单
alt space
alt空间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Under Snow Leopard, pressing Alt + Space give you a full-screen Quick Look preview.
在雪豹中，按下alt +空格就会弹出一个全屏幕Quick Look预览。
youdao
One is the alt.space movement, which consists of people funding attempts to get into space using money made in the information-technology boom.
ECONOMIST: Lost in space
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