Gmail Labs added two new experimental features: a "Mark as Read" button and a very basic script that warns if you write about attaching documents but you forget to actually attach them.
狗妹实验室又添加了两款新的功能：一个是标记为已读按钮，还有一个非常简单的脚本，在你忘记添加附件的时候会提醒你添加的。
Element, method of attaching element to plate-like component, assembly and die button.
元件，该元件固定到一板状组件上的方法，组件总成及模扣。
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