{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/ae\/Take-a-Screenshot-on-a-Mac-Step-2.jpg\/v4-460px-Take-a-Screenshot-on-a-Mac-Step-2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/ae\/Take-a-Screenshot-on-a-Mac-Step-2.jpg\/v4-760px-Take-a-Screenshot-on-a-Mac-Step-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}2按下Command+Shift+3。