That has kept display advertising revenue, where Yahoo had long been the top player in North America, hobbled as well.
这使得雅虎的展示广告收入也停滞不前，而雅虎在这个领域曾长期占据北美头把交椅。
Heliconius butterflies display incredible color pattern variation across Central and South America, with closely related species usually sporting different colors.
从中美洲到南美洲的区域里，邮差蝴蝶展示着令人难以置信的颜色形式的变化，越是关系亲密的种群其颜色的差别越大。
Especially in America, newspapers rely heavily on classified ads online and have fewer display ads, says Mr Crosbie.
特别是在美国，Mr Crosbie说，报纸公司都十分那依赖在线分类广告，并且还有一些显示性广告。
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