Alt标签无法在我的网站上运行
我想弄清楚为什么alt图片代码无法在我的网站www.slickcar.com上运行。我已经查看了alt =标签，看起来是正确的但是当我在IE，Chrome或Firefox中查看时，当我将鼠标悬停在图像上时，它们不会显示。
I am trying to figure out why alt image tags are not working on my site www.slickcar.com. I have reviewed the alt= tag and it looks correct but when I look at in the IE, Chrome or Firefox they do not display when I hover over the images.
alt 属性并不是一个工具提示。它用作图像的文本替代，例如对于屏幕阅读器或文本浏览器用户，搜索引擎等。 alt 属性的值应描述内容（=图像），以便有人能够理解其含义/目的没有看到它的图像。
The alt attribute is not meant to be a tooltip. It serves as text alternative to the image, e.g. for screen reader or text browser users, search engines etc. The value of the alt attribute should describe the content (= the image), so that someone can understand the meaning/purpose of the image without seeing it.
title 属性的值通常显示为工具提示。它应该提供额外的（而不是替代）信息。
The value of the title attribute is typically shown as tooltip. It should give additional (and not alternative) information.