Buy and sell graphics, images and logos.

购买和出售的图形，图像和标识。

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So bitmaps play a useful role, but for those images that can be decomposed into basic shapes such as diagrams, logos, and chemical formulas, a vector file format is inherently more efficient.

因此位图的地位依然很重要，但是对于那些可以分解成基本形状的图像，比如图表、标志、和化学公式等等，矢量文件格式天生就具有较高的效率。

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As part of the redesign, friends' photos will now appear larger and shared articles will include bigger images, text and the logos of publishers.

WSJ: Facebook Unveils Sweeping Changes to News Feed