辅助选项支持的两大重要功能就是屏幕读取器和屏幕放大镜。
Two of the most important features of accessibility support are screen readers and magnifiers.
屏幕读取器读取替换文字，而图像只占用一个像素的空间。
Screen readers read the alternate text aloud, and the image occupies only one pixel space.
屏幕读取器会读出替换文字，但图像不会打扰该页的可视化流。
Screen readers read the alternate text aloud but the image does not disturb the visual flow of the page.
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